Транскрипция YouTube:
Time is an Illusion : Past, Present, and Future Coexist!

Не тратьте время на просмотр целиком — получите полный текст видео, найдите нужные слова и скопируйте одним кликом.

AutoDub

Понимайте иностранные YouTube-видео

Погружающий дубляж YouTube на русском

Ломайте языковые барьеры, наслаждайтесь лучшим контентом со всего мира

Попробовать бесплатно

Транскрипция видео

humans consider themselves unique so

they have rooted their whole theory of

existence on their

uniqueness one is their unit of measure

but it's not every social structure we

build is only a mere sketch we have

codified our existence to bring it down

to human size to make it comprehensible

to help us forget its unfathomable scale

we created a

scale but if the universe is not

regulated by mathematical laws and

humans are not the unit of measurement

then what governs on

that time gives legitimacy to its

existence time is the only true unit of

measure it provides evidence for

Matter's

existence without time we don't

exist time is unity

[Music]

think of a river the river moves with a

smooth steady Rhythm its Waters Gliding

Over rocks and swirling into

edies from afar the river might seem

like a single Continuous Flow a ribbon

of water stretching from the heights of

the mountain to The Valleys

below but stand at the The Edge and

watch it long enough and you'll notice

the river is never the same the water

you see now is not the same water you

saw a moment

ago heraclitus once said you cannot step

into the same river twice each drop once

it passes is gone forever replaced by

new ones which in turn will also Rush by

and disappear

Downstream and yet despite this endless

change the river seems Eternal it's

always there flowing onward never

pausing never

retreating this River always moving

forward is much like how we imagine

something

else time we often picture time as a

flowing current sweeping us along in its

Relentless stream from past to

Future like the river we cannot step

into the same moment twice every instant

is new different slipping away as

quickly as it arrives yet just as the

river bends or slows so too can time

Einstein showed us that time can stretch

and contract depending on where you are

and how fast you're moving imagine

speeding down a river at Breakneck Pace

everything around you blurs while to

someone sitting still on the bank the

flow seems slow slower almost

calm time behaves in a similar way for

someone moving near the speed of light

time slows down compared to someone

standing still and there's more picture

a river that

freezes when the flow stops the water is

trapped in a single moment creating a

crystalline surface that glistens in the

sunlight in certain extreme conditions

time itself pauses

much like the still surface of an icy

River the water beneath remains

suspended caught in a moment of

Stillness in the depths of space near a

black hole time Slows To almost a

standstill the river of time which we

believe moves ever forward becomes

sluggish and nearly Frozen ens snared by

the gravity of the

cosmos we live our lives feeling Time

Rush past us like the river but if we

look closer ER we begin to see that time

isn't as straightforward as we might

think the river's flow can be bent

stopped or stretched in ways that seem

impossible at first

glance is time any different could it be

that time is in fact just an illusion

the arrow of time points in one

direction from the past to the Future

marking a clear distinction between what

has already happened and what is yet to

come this forward flow is evident in

everything around us waves crash and

recede leaves fall and Decay and energy

dissipates as processes unfold in

irreversible

ways but why does time only seem to move

in one way and is this movement a

fundamental property of the universe or

just an illusion of human

perception one of the key to these

questions lie in something that at first

glance appears unrelated something

hidden in the fabric of reality

itself it was the dawn of the Industrial

Revolution steam engines were driving

trains across continents powering

factories and transforming

Society but despite the Practical

Mastery of these engines there was still

a fundamental mystery at

play what exactly was happening inside

these machines and why did they seem to

waste so much energy why couldn't they

run

forever Rudolph clausius was a curious

man and these questions stuck with him

heat he knew wasn't a substance it

wasn't some invisible fluid that moved

between objects as s scientists once

believed it was energy in motion

transferred from one system to another

but something about this energy puzzled

him when steam engines burned fuel to

create motion a lot of heat seemed to

disappear into the environment wasted

and

unusable why clausius wondered did

energy seem to flow in only one

direction from hot to cold from useful

useless and more importantly

why couldn't you reverse the process to

recover the lost

energy what was this invisible barrier

that made some Transformations possible

and others

impossible Claus's moment of insight

came when he began to see heat not as a

magical flowing entity but as energy

that obeyed strict rules rules that

couldn't be broken no matter how

cleverly you built your engine

after years of experiments calculations

and thought he formulated a principle

that would forever change our

understanding of the universe the second

law of

Thermodynamics and it states in any

closed system the total entropy will

always increase over time energy will

always spread out and become more

disordered making some processes

irreversible imagine a steam steam

engine with two Chambers one filled with

hot steam the other cooler as the steam

flows from the hot side to the cold side

it pushes a piston converting some of

the heat energy into mechanical work

like moving a wheel but here's the catch

not all the energy from the steam is

converted into useful work some of it

leaks out as waste heat spreading into

the environment no matter how well you

design the engine you can't stop this

leakage heat always flows from the hot

side to the cold side never the other

way

around this flow is what Claus realized

was the heart of the second law in

nature energy spreads out hot things

cool down order becomes disorder this

tendency toward disorder this Relentless

March toward Randomness is what clausius

named entropy and once entropy increases

it's nearly impossible to reverse

it let's take a simple example picture a

box filled with a 100 marbles at first

you arrange all the red marbles on one

side and all the blue marbles on the

other this is a state of low entropy

highly ordered and organized now shake

the Box the marbles will scatter

randomly mixing together after a few

shakes you'll see a chaotic jumble of

colors this mixed state is high entropy

the marbles are no longer arranged

neatly and it would take considerable

time and effort to separate them again

now shake the Box

continuously what are the chances that

by sheer luck all the red marbles will

spontaneously regroup on one side

essentially zero that's the essence of

entropy once a system becomes disordered

the mods of it returning to a highly

ordered state are so small that it's

effectively impossible energy like those

marbles naturally spreads out in

thermodynamics it means heat spreads

from hot areas to cold ones and it never

flows backward on its

own you could build the most advanced

machine imaginable and still it would

never extract energy from cold steam to

heat it up again entropy would always

have the final

word Claus's law didn't just explain the

workings of engines it had profound

implications for time

itself the second law of Thermodynamics

suggests that the direction of time is

tied to the increase of entropy the

reason we experience time as moving

forward rather than backward is that

entropy is always

increasing you remember the past the

time when the marbles were neatly

separated because it was a state of

lower

entropy but you don't remember the

future because that's where the marbles

are mixed the steam has cooled and the

energy has spread

out consider your morning coffee when

you pour it the steam Rises and The

Coffee quickly cools the heat energy

from the coffee spreads into the

surrounding air increasing the entropy

of the system it's impossible to undo

this process you'll never see the steam

gather back into the coffee to make it

hot again in fact the only way to reheat

the coffee is to add new energy perhaps

by placing it in a

microwave this too increases the overall

entropy of the system because the

microwave uses electricity which itself

generates waste heat every time we do

work or transfer energy entropy

increases somewhere in the universe

or think of an egg before it's cracked

the egg is a highly ordered

system its yolk and whites are neatly

contained within a

shell but the moment you crack it open

the eggs entropy increases the whites

and yolk mixed together and as you cook

it heat spreads through the liquid

changing its

structure you'll never get the egg back

into its original low entropy State

you'd have to manipulate each molecule

with impossibly fine Precision putting

every drop of Yol back into the exact

place it was

before the increase in entropy makes the

transformation irreversible and it's

that irreversibility that gives time its

forward Arrow entropy ensures that time

always moves forward from unburned match

to ashes from whole egg to breakfast

it's what gives our experience of time a

kind of Arrow always pointing in the

same direction but for most of human

history people didn't think of time in

terms of entropy or physics they thought

of it in terms of Cycles sunrise and

sunset the changing seasons the phases

of the

moon in ancient times people's

relationship with time was Inseparable

from the natural

world before clocks ticked off the

minutes and smartphones buzzed with

reminders

the movements of the sky the phases of

the moon and the Turning of the seasons

were the only clocks people knew the

cycles of nature not only told people

when to plant Harvest or celebrate but

also gave rise to some of the earliest

calendars tools that shaped our weeks

months and years in ways that still

influence us today in ancient Egypt the

Rhythm of Life was set by the flooding

of the Nile

River each year the river swelled with

Waters from distant rains spilling over

its banks and transforming parched

Fields into fertile land to the

Egyptians this wasn't just an annual

inconvenience it was a Divine event both

destructive and lifegiving the flood

marked the beginning of a new

agricultural cycle a natural reset

button that dictated when to sew seeds

and reap harvests

Egyptian priests closely monitored the

sky for signs of the star Sirius whose

rising in the dawn sky coincided with

the floods over time this observation

became the backbone of the Egyptian

solar

calendar a 365-day year divided into

three seasons AET the flood pet the

planting season and Shemu the dry

harvest

season but tracking entire years was not

enough people needed to measure the

hours of the day

too the Egyptians pioneered Su dials

carving stone markers to follow the

movement of shadows as the sun arked

across the sky early Sund dials weren't

precise by modern standards they divided

the day into broad segments offering

more of a general sense of morning

midday and evening life at that time

didn't need the Precision of modern

schedules it was enough to know when it

was time to tend the fields or return

home before dark time was measured in

rhythms not in minutes and the aurban

flow of daily life mirrored the slower

pulse of the natural world the Egyptians

also developed water clocks or klep

cidra these were vessels with a tiny

hole near the bottom that allowed water

to drip out slowly marking the passage

of time as the water level dropped it

revealed different markings that

indicated ated how much time had passed

water clocks were used in temples to

track ritual activities at night when

the sun and therefore the Sundial was no

longer of use time to them was a sacred

thing tied to their ceremonies prayers

and the great rhythm of life and death

governed by the

gods over time measuring tools became

more refined but their purpose remained

the same to line human life with the

patterns of nature for most of History

time wasn't rigid it was flexible

responding to the cycles of light and

dark the seasons of growth and

rest Farmers rose with the sun and slept

when it

set in this world time was a guide not a

tyrant helping people navigate life's

uncertainties but never dictating every

second the sh shift from natural time to

Mechanical time began quietly like the

first few ticks of a clock barely

noticed by the world it would soon

reshape it all started in the late 13th

century when the first mechanical clocks

were installed in European Church

Towers these early Clocks Were cruded by

today's standards instead of hands

moving across a dial they used bells to

Mark the hours ringing out across

villages to call monks to pray

or signal towns people to gather for

markets time which had once been

personal and local was becoming

something public something heard not

just felt but even at this stage time

still served The rhythms of daily life

the bells didn't demand obedience they

simply announced the passing of

hours the real shift came in the 17th

century with Christian haggens a Dutch

scientist whose rest mind turned a

casual observation into one of the most

transformative inventions of all time

the pendulum clock hens was fascinated

by the precise movement of the heavens

the way planets swung around the Sun the

moon circled the earth and the Stars

returned to the same points in the sky

night after night nature haens believed

operated on a grand Mechanical Rhythm

one that could be understood stood and

measured but the timekeeping devices of

his era Sund dials and water clocks were

crude and prone to

drift time slipped through their

cracks what if Higgens thought it was

possible to create a clock that never

faltered a machine that ticked as

reliably as the cosmos moved haan's

breakthrough came from a curious

observation about pendulums a swinging

pendulum he noticed followed a steady

and predictable Rhythm it always took

the same amount of time to swing back

and forth regardless of the size of the

Ark this was a property now known as

isochronism and it intrigued

him if this natural regularity could be

harnessed hens realized it could serve

as the engine of a new kind of clock one

far more accurate than anything the

world had seen

before in 1656 haggens built the first

pendulum clock capable of measuring time

with an accuracy of within 10 seconds

per day a vast improvement over anything

available at the

time around the same time as haan's

pendulum clock revolutionized the

measurement of time another figure was

also working on ideas that would forever

reshape our understanding of the world

Isaac Newton both higens and Newton

lived in the 17th century an era of

scientific transformation

while Higgens was perfecting the

mechanics of pendulums and timekeeping

Newton was developing a framework that

would define how we think about time and

space for centuries classical

mechanics Newton's Laws of Motion laid

out in his seminal work often just

called the principia described a

universe that operated like a perfectly

engineered machine in this view time

flowed uniformly and independently

unaffected by anything happening in the

world Newton wrote absolute true and

mathematical time of itself and from its

own nature flows equably without

relation to anything external in other

words time in Newton's Universe was like

the steady tick of a pendulum constant

unwavering and

eternal it marched forward regardless of

the events unfolding within it

to understand Newton's concept of time

think of it like a cosmic stage where

events

unfold the stage is unchanging and the

actors the planets stars and every

object on earth move according to well-

defined

rules these rules are Newton's Laws of

Motion which describe how forces cause

objects to

move the beauty of these laws is their

Simplicity and precision just as haan's

pendulum clock made time measurable in

seconds and minutes Newton's equations

made it possible to predict the motion

of objects with almost frightening

accuracy a cannonball fired into the air

a planet orbiting the Sun or even an

apple falling from a tree all could be

described using the same basic

principles in this Newtonian Universe

time was absolute and space was an empty

three-dimensional Grid in which objects

existed and

moved an easy way to visualize this is

to draw a graph with three axes length

width and height this grid represents

space and every object in the universe

occupies a specific point on it now time

is a separate invisible line that

stretches forward into the future the

objects in space move along this time

but time itself doesn't Bend or change

it simply advances second by second like

the steady tick of haan's

pendulum Newton's Laws made it possible

to predict how objects would move

through this grid of space and time for

example if you were to throw a ball into

the air Newton's second law where Force

equals mass time acceleration would

allow you to calculate exactly how high

the ball would go and when it would

return to the ground time played a

crucial role in these calculations

acting as the invisible framework that

held the entire system together but

crucially time itself wasn't affected by

the ball's motion it ticked forward

evenly just as it would if the ball had

never been thrown at all Newton's view

of time as an unchanging Universal

backdrop was so compelling that it

shaped the scientific world for

centuries his laws governed everything

from the swing of hen's pendulum to the

trajectory of planets creating a vision

of A Clockwork Universe where time

flowed like a river steady and

predictable haan's pendulum ticking in

perfect harmony with Newton's equations

seemed to capture the very essence of

time's

regularity in this world every second

was identical to the last and every

event could be traced back to precise

causes and Claus's work on entropy

introduced a new dimension to the flow

of time Claus's second law of

Thermodynamics revealed that while

Newton's equations might predict the

motion of objects and time they said

nothing about the direction of time

Claus's entropy law pointed to an

irreversible Arrow of time where systems

naturally moved from order to disorder

never the other way around time wasn't

just a passive River anymore it had a

direction a purpose an inevitable March

towards the

future and so the universe began to seem

less like Eternal clock and more like a

one-way street with entropy as its

guiding force the steady rhythm of

haan's pendulum was still there but now

something else was at play a cosmic

Trend towards chaos that Newton's tidy

equations could not explain but what if

this Arrow of time isn't as

straightforward as it seemed

what if everything we think we know

about time about its flow its direction

could be

[Music]

overturned Albert Einstein was a dreamer

long before he was a

scientist growing up in the small German

Town of ol the Young Einstein was known

more for his daydreaming than for his

academic prowess

he found the rigid schooling systems of

his youth stifling far more interested

in the mysteries of the universe than in

rote memorization or mechanical

obedience but there was one thing that

captured his imagination like nothing

else

time it seemed to Young Einstein that

time was something more mysterious than

a clock ticking in the corner of the

room what he wondered if time wasn't as

constant as it appeared what if time

could

Bend Einstein's early curiosity about

time was ignited by a thought experiment

that would forever change the course of

physics he began to realize that time

might not be the fixed entity everyone

assumed it to be what if time like space

could be affected by motion what if time

itself could

Bend in 1905 as a young clerk in a Swiss

patent office his thought experiments

fin crystallized into what we now know

as the special theory of

relativity in this Theory Einstein

proposed something revolutionary time

and space were not separate entities but

part of a single fabric woven together

into what he called

SpaceTime the motion of objects through

space he argued could actually affect

the passage of

time the faster you moved through space

the slower time passed for you it was a

a startling conclusion one that flew in

the face of centuries of classical

physics where Newton said that space and

time act separately in a future not too

distant from us there were two identical

twins Alice and Bob they were born on

the same day at the same time and lived

their entire childhood together always

the same age but one day Alice ever the

adventurer decided to set off on a

journey to the Stars Alice boards a

spaceship capable of incredible speeds

close to the speed of light Bob on the

other hand stays back on earth watching

his sister take off into the vast

unknown now here's where things get

interesting according to Einstein's

theory of special relativity time

behaves differently for Alice the one

speeding through space than it does for

Bob who remains stationary on Earth the

faster Alice travels the slower time

ticks for her compared to Bob Alice's

Journey takes her to a distant star

system many light years away let's say

it's a round trip she speeds out into

the cosmos reaches a far off star and

then turns around to head back to Earth

from Alice's point of view the trip

seems relatively short after all her

clock isn't ticking as fast as Bob's but

Bob watching from Earth experiences a

very different reality finally Alice

returns to earth the Moment of Truth

arrives Bob runs out to greet his sister

but there's a shocking difference Bob is

now much older than Alice while only a

few years may have passed for Alice on

her high-speed Journey Bob has aged far

more during her

absence how could this be this is the

heart of the twin paradox two twins born

at the same time time but due to one

traveling near the speed of light they

no longer age at the same rate the

faster Alice traveled the slower time

passed for her relative to Bob and when

they reunite the difference is

undeniable time has bent and

stretched the twin paradox isn't just a

hypothetical thought experiment it's

been tested and the results consistently

support Einstein's

predictions in 1971 the world witnessed

an experiment that seemed straight out

of Science Fiction the harle keting

experiment as it would come to be known

was a direct test of one of the

strangest consequences of Einstein's

theory of relativity gravitational time

dilation Joseph huffle a physicist and

Richard keting an astronomer were

determined to test whether gravitational

time dilation and the relativistic

effects of motion what's called

kinematic time dilation could be

observed using modern technology by the

late 1960s and early 1970s atomic clocks

had become precise enough to measure

tiny differences in time down to Nan

seconds this development paired with the

relatively high speeds of commercial

jetliners and the ability to fly at high

altitudes open the door for a truly

novel

experiment the duo theorized that by

flying atomic clocks around the world

they could observe the twin paradox in

action even if on a much smaller scale

the idea was simple planes fly at high

altitudes where Earth's gravitational

pool is weaker and they move at high

speeds relative to the ground both of

these conditions should cause time on

the planes to tick differently from time

on the ground in effect they wanted to

replicate the twin paradox with highly

sensitive clocks as their stand-ins for

the traveling twin and the twin on Earth

the real challenge lay in the details

coordinating flights ensuring Precision

in their measurements and accounting for

countless

variables in October 1971 hael and keing

boarded two commercial airliners with

four cesium beam atomic

clocks these tiny differences were

enough to demonstrate that time really

does behave differently depending on

speed and gravity the implications of

heril and King's experiment was beyond

what we imagined it was the foundation

for technologies that would soon become

Central to Modern Life Today systems

like GPS rely on an understanding of

both General and special relativity to

function satellites orbiting Earth must

account for the fact that their clocks

far from the gravitational pull of the

planet and moving at High high speeds

tick faster than those on the ground

without these Corrections GPS systems

would quickly become inaccurate leading

to navigation errors of miles in just a

day GPS satellites orbit the Earth at an

altitude of about 20,200 km and move at

speeds of roughly 14,000 km

hour each satellite carries an extremely

accurate atomic clock just like the ones

used in the harle keting experiment

these clocks are synchronized with

clocks on the ground but as Einstein

predicted they don't stay synchronized

for long first because the satellites

are moving quickly relative to the

Earth's surface special relativity comes

into play slowing down time for them

compared to an observer on the ground

this is kinematic time

dilation but the satellites are also far

from the gravitational pull of Earth so

according to general relativity time

ticks faster for them than it does for

clocks on

Earth the combined effect of these two

forms of time dilation is critical for

the accuracy of

GPS special relativity predicts that the

satellite clocks should tick about 7

micros seconds 7 millionths of a second

slower each day compared to Earthbound

clocks meanwhile general relativity

predicts that because the satellites are

farther from the Earth's gravity their

clocks should run about 45 micros faster

per

day the net effect is the time on the

GPS satellites ticks about 38 micros

faster per day than clocks on the ground

while 38 microsc may seem like a tiny

difference GPS depends on the

synchronization of time to calculate

position the system works by

triangulating signals from multiple

satellites calculating how long it takes

for a signal to reach a receiver from

different

satellites if the satellite clocks were

even slightly off this timing error

would Cascade into navigational errors

in fact without accounting for these

relativistic effects GPS systems would

accumulate errors of around 10 km about

6 m per day thus to ensure the accuracy

of GPS the system Engineers apply

precise corrections to compensate a time

dilation every GPS satellite has a

system that adjusts its clocks to

account for both the speed of the

satellite and the weaker gravitational

field at high altitude but as Engineers

have learned to adjust for time dilation

for GPS A new challenge has emerged in

keeping

time you see the Earth's rotation is not

perfectly steady it slows down over time

due to Tidal forces and other factors

our standard measure measurement of time

however based on atomic clocks is

extremely steady over months and years

the slight variations in Earth's

rotation accumulate causing atomic time

and Earth's rotational time to drift out

of sink to bridge this growing Gap

scientists introduce a leap second this

extra second is added to coordinated

universal time UTC to keep it in line

with the solar time usually at the end

of June or December and here's where the

problems begin most computers and

servers worldwide run on a system of

continuous ever forward counting time

they don't expect a second to repeat or

disappear when a leap second is added

clocks on computers must account for a

rare and irregular second unfortunately

this tiny hiccup can trigger major

malfunctions in software systems leading

to crashes freezes or even more

dangerous

consequences one of the most infamous

cases occurred in 2012 when a leap

second was added on June

30th major websites and online services

including Reddit Mozilla and Linkedin

experienced significant

outages the root cause these systems

weren't programmed to handle the leap

second correctly most servers rely on

the network time protocol ntp to to keep

their clocks in sync when ntp informed

them that an extra second had been

inserted many systems tried to process

this additional second but the software

wasn't prepared to handle the

irregularity leading to crashes and

timeouts time is critical in these

industries where every second or even

millisecond can make a difference in

trades and

transactions when the leap second

disrupted the normal flow of Time

Financial systems had to scramble to

compensate

Engineers have developed Creative

Solutions to minimize the impact of leap

seconds one such solution is called leap

smearing which was introduced by

companies like Google instead of adding

a leap second all at once Google's

servers gradually spread the leap second

over a 24-hour period by slightly

lengthening each second leading up to

the event this process Smooths the

transition and prevents the disruptions

caused by the sudden addition of an

extra second but what if instead of

merely adjusting seconds we could stop

them Al together what if for a brief

moment time itself could be Frozen not

just in theory but in

practice there are Whispers in the

scientific Community hidden within the

equations of quantum mechanics of

phenomena that could stretch the

boundaries of time beyond recognition

and perhaps just perhaps we're closer to

uncovering the first real glimpse of

this elusive chilling concept than

anyone is prepared to

[Music]

admit in the spring of 1963 a young Kip

Thorne fresh from a PhD program at

Princeton stood in awe as he visited

John archal Wheeler's office wheeler one

of the great theoretical physicists of

the 20th century was famous for pushing

the boundaries of human understanding

from quantum mechanics to general

relativity Thorn's first encounter with

the concept of black holes began in that

office a conversation that would change

the course of his life wheeler spoke

about the then controversial idea that

massive stars could collapse into INF

itely dense points regions where gravity

would overpower all other forces and

distort the very fabric of SpaceTime

wheeler called them black

holes at that moment Thorn became

hooked from that day the young physicist

dedicated himself to uncovering the

relationship between black holes gravity

and time over the next few decades Kip

Thorn became one of the leading voice

voices in the study of general

relativity focusing particularly on how

extreme gravitational phenomena influen

time his career was built on the idea

that black holes were not only real but

that they held the key to unlocking

profound truths about the nature of time

itself Thorne realized early on that

Einstein's theory of general relativity

predicted something

extraordinary the Clos you get to a

massive gravitational field like the

edge of a black hole the more time

stretches and distorts for thorn

understanding this time dilation was not

just about equations it was about

answering a haunting question could time

ever stop and if so what would that

mean in technical terms the relationship

between time and gravity can be traced

to Einstein's field equations which

describe how mass and energy warps

SpaceTime at the heart of this Theory

lies the concept of SpaceTime

curvature the idea that massive objects

bend the geometry of the universe the

stronger the gravitational field the

more pronounce this curvature and the

slower time flows in that region this

effect known as gravitational time

dilation has been confirmed through

experiments on Earth such as with

precise atomic clocks flowing on

airplanes but it reaches its extreme

near black

holes Alice wasn't content with just one

journey into the mysteries of time after

her light speed Adventure where she had

witnessed the effects of Relativity

firsthand there was something deeper she

needed to explore the nature of time

near a black hole where gravity Twisted

it to its Breaking Point her new mission

was set in the Sagittarius A system the

super massive black hole lurking at the

center of the Milky Way galaxy the black

hole a monstrous entity with a mass

millions of times that of the sun was

the perfect place to push the limits of

everything she and Bob had

learned the journey from Andromeda to

Sagittarius A took weeks but to Alice in

her Lightspeed spacecraft it passed in a

blur the vast distances between Stars

felt inconsequential and as she hurtled

through space propelled by the ship's

Advanced Fusion drive her ship flew past

distant star clusters and through

regions of space rarely visited by

humans heading for the galactic

[Music]

core as the ship gets closer to the

black hole the dense region surrounding

Sagittarius A known as the accretion

disc glowed with radiation from matter

swirling around the black hole ho at

incredible

speeds but beyond that disc there was

only Darkness a void where light itself

couldn't

escape as Alice's spacecraft drifted

ever closer to the event horizon of

Sagittarius A the effects of

gravitational time dilation became more

and more pronounced the massive black

hole with its immense gravitational pull

was bending SpaceTime so severely that

it was no longer just a theoretic

concept on paper the deeper she ventured

into the black hool's gravity well the

more extreme the effects

became gravitational time dilation was

reaching its extreme but what exactly

happens to time at the Event Horizon to

answer this question we need to dive

deeper into the mathematics of general

relativity near the Event Horizon the

SpaceTime curvature becomes so intense

that the differential rate of time how

fast time flows reaches Zero from the

perspective of a distant

Observer this doesn't mean that time has

literally stopped for someone falling

into the black hole from their

perspective time would continue to pass

normally however for an external

Observer it would appear as though the

person falling in had been frozen in

place forever suspended in the last

moment before crossing the Event Horizon

this paradoxical nature of time time

flowing normally for one Observer while

appearing Frozen for another arises from

the relativity of

simultaneity Einstein showed that the

concept of now is not absolute but

depends on the observer's frame of

reference in the extreme environment

such as near a black hole this

relativity becomes starkly

apparent as an object continues to fall

into a black hole the story of time

takes on even more bizarre twists

from the perspective of a distant

Observer the infalling object appears to

slow down asymptotically approaching the

Event Horizon without ever actually

Crossing

it this phenomenon is tied directly to

the immense gravitational field which

distorts SpaceTime in such a way that

light emitted from the object is

stretched into longer wavelengths a

process known as gravitational red shift

event the object becomes invisible as

the light is red shifted Beyond

detection but what happens from the

Viewpoint of the object itself for

someone falling in the event horizon

marks no special boundary they would

cross it without noticing anything

unusual at that precise moment and time

would seem to flow

normally however as they approach The

Singularity the core of the black hole

where SpaceTime curvature becomes

Infinite Space and Time themselves

become so warped that the very concepts

of Direction and time cease to have

conventional

meanings the equations of general

relativity break down here and quantum

mechanics must be invoked to describe

the fundamental structure of SpaceTime

but if the object seems to disappear

from the universe what happens to all

the information it contained its mass

energy and every detail about its

existence

does this information simply vanish

defying the laws of physics or could it

be preserved in a way we can't easily

perceive this brings us to the

holographic principle a concept that has

emerged from the study of black holes

and quantum

gravity the principle traces its roots

to the groundbreaking work of Dutch

theoretical physicist Gerard Hof and its

later development by Leonard saskin

both were grappling with a central

problem in black hole physics the black

hole information

Paradox Gerard Hof already a prominent

physicist in the 1980s had spent much of

his career thinking about the

relationship between quantum mechanics

and

gravity as a scientist deeply influenced

by the work of Steven Hawking Hof was

fascinated by the realization that black

holes radiate energy a process now known

as Hawking

radiation according to Hawking's

calculations this radiation causes a

black hole to lose mass and eventually

evaporate but there was a catch if black

holes eventually disappear where does

the information contained within them go

this presented a crisis in

physics according to Quantum Theory

information about a physical system is

never truly lost but Hawking's work

seems to suggest that when a black hole

evaporated all the information about the

matter it had swallowed would be

irretrievably

erased this violation of the principles

of quantum mechanics led to the

so-called information

Paradox Hof's thought process was shaped

by this Paradox he knew that either

quantum mechanics or general relativity

or both had to be

incomplete one day while contemplating

the event arising of a black hole he had

a key Insight what if the information

about everything that falls into a black

hole doesn't get lost but is somehow

stored at the Horizon itself this would

mean that the event horizon acts like a

two-dimensional surface capable of

encoding the three-dimensional

information of everything that enters

the black

hole this line of thinking though

speculative resonated with the strange

mathematics of black holes H began to

suspect that the entire universe might

operate similarly where the information

of all physical processes could be

encoded on a distant boundary just like

the Event Horizon of a black hole it was

Leonard saskin an American physicist

known for his work in string theory who

would later expand on Hof's

idea saskin had been troubled by the

same Paradox and saw Hof's concept as

the key to resolving it building on

these ideas he developed the holographic

principle which posits that all the

information within a volume of space can

be represented on the surface enclosing

that volume this was a radical

rethinking of how space and time might

work at the deepest levels of reality

his analogy was simple think of a

hologram a hologram is a two-dimensional

surface yet it creates a

three-dimensional image

what if in a similar way the

three-dimensional Universe we experience

is actually a projection from a

two-dimensional surface in terms of time

this suggests that what we perceive as

the flow of time might be an intricate

projection of deeper lower dimensional

processes much like how the

three-dimensional world we experience

could be a holographic image emerging

from a more fundamental two-dimensional

reality

this possibility opens the door to

rethinking time not as something that

moves from past to future but as an

everpresent structure where all moments

coexist

simultaneously some suggest that past

present and future could all exist

together in a kind of unchanging Eternal

framework picture the loaf sitting on

your kitchen counter each slice

represents a particular Moment In Time a

specific event or experience in your

life the slice where you are now sitting

and viewing these video is what you

refer to as the present but crucially

the other slices are all there too the

day you were born your first day of

school that time you aced a test your

first love and perhaps even the moment

of your final breath none of these

slices disappear or get erased once

they've been experienced nor do they

need to be created As you move forward

through time they already exist side by

side within the

loaf now let's take this a step further

imagine that instead of a single loaf

there's a bakery full of loaves with

each loaf representing the life of a

different individual or the history of a

different object from the motion of

distant galaxies to the decay of

subatomic

particles these loaves don't exist in

isolation but are connected influencing

one another some slices in your loaf

might overlap with slices in other

loaves the moment you meet someone for

the first time for example or when a

historical event occurs that affects

Millions these intersections are moments

where different threads of the universe

weave together this idea is widely known

as a block Universe in this model of

reality the past present and future all

coexist fixed within A four-dimensional

Spacetime

block time is not something that flows

from moment to moment as we typically

experience it instead all moments exist

simultaneously like pages in a book

where the narrative is already written

from beginning to end this notion

fundamentally challenges our everyday

perception of time as a sequence of

events unfolding

but how did we arrive at such a strange

and often unsettling idea over the

following Century many physicists

expanded on this concept Carlo relli a

theoretical physicist known for his work

in quantum gravity is one such scientist

relli proposes a relational view of time

suggesting that what we call time is

simply a measure of change between

different configurations of matter in

the universe

from this perspective the idea of an

objective present moment doesn't make

sense instead all moments are equally

real existing in a relational web within

the block Universe framework this

deterministic view where the future is

already laid out just as the past is has

deep implications for how we understand

Free Will and the nature of reality

itself if time is a dimension in

SpaceTime then what we perceive as

Choice May simply be our journey through

an already determined path in the

Block in more recent work physicists

like sha Caroll have extended

discussions of the block Universe into

the realm of quantum mechanics and

cosmology from the perspective of

someone within the block time appears to

flow events seem to unfold and choices

seem to matter but at a deeper level all

these moments births and death s choices

and chances are simply coordinates in

SpaceTime all existing

simultaneously but this isn't the end of

the story let's take this idea even

further what if the loaf itself is an

illusion what if there is no before or

after not because all moments exist at

once but because the very concept of

moments of any sequence any progression

doesn't exist at all what if everything

we think of as reality every event every

me memory every tick of the clock isn't

just coexisting but is at its core

[Music]

nothing a self-described Outsider to the

academic establishment Julian Barber

never pursued the traditional path of

tenure or

professorship instead he worked as a

translator to fund his inquiries moving

from one project to another piecing

together his theory bit by bit he was an

anomaly a physicist without a university

affiliation working from his home in the

Oxfordshire

Countryside barbera's academic

background however was

solid his Early Education placed him at

the intersection of the two Fields

mathematics and physics that would

underpin his later work on time but even

with these credentials Barber chose to

follow an unconventional path in his

early career barar had deep doubts about

the nature of time as presented by

contemporary

physics his first doubts about the

nature of time emerged from his studies

of general relativity and quantum

mechanics in the 1960s while working on

his PhD dissertation at the University

of cologne Barbour became captivated by

Einstein's theory of general relativity

which treats time as part of a unified

fabric called

SpaceTime in this framework time does

not flow in the way we experience it

rather it is a coordinate no more

special than the three spatial

Dimensions events exist within the

SpaceTime fabric like dots on a map

simultaneously present without any one

event inherently becoming another but if

time did not flow in general relativity

barara wondered what was its real

nature around the same time he became

intrigued by quantum mechanics a field

where time plays A peculiar role in

shring as equation time is simply a

parameter and Quantum States evolve

deterministically yet when we observe a

Quantum system we experience seemingly

random discrete outcomes suggesting a

disconnect between the deterministic

equations and the probabilistic reality

we encounter

these inconsistencies between quantum

theory and relativity planted the first

seeds of doubt in Barber's mind what if

the problem wasn't with the theories

themselves but with how they used time

Barber's Quest For answers led him to

explore an obscure idea proposed by the

physicist John Wheeler that the Universe

might be described in terms of

configurations rather than evolving

States

wheeler had suggested that instead of

tracking the changes a system undergoes

over time physics could focus on the

possible Arrangements of matter in space

what Bara would later call the NS of

platonia this was one of the key moments

in barba's process was recognizing how

memory plays a role in our perception of

time he realized that the sense of flow

the feeling that the present arises from

the past and flows into the future might

be an illusion generated by how

information is stored in certain Nows

records of past configurations are

encoded giving us the impression that

events have unfolded in

sequence however Bara argued these

memories are just features of individual

configurations not evidence of an actual

passage of time the arrow of time our

perception that the past lies behind us

and the future ahead emerges from the

way information is structured within

specific configurations not from any

fundamental property of the universe in

1999 Barber published his Monumental

work the end of time a book that

crystallized his ideas and brought them

to a broader

audience in it he laid out his discovery

that time is not a fundamental aspect of

reality but an emergent illusion

platonia is the conceptual ual landscape

at the heart of Julian Barber's findings

named after the ancient Greek

philosopher Plato as a homage to his

theory of forms the idea representing

the collection of all possible

configurations of the universe each a

distinct Timeless

now in platonia these configurations

exist independently of one another

without any intrinsic order or sequence

instead of a continuous flowing timeline

Line Reality is composed of a vast

multi-dimensional space where every

moment exists

simultaneously complete in

itself there is no past or future only a

static array of possible States each

representing the entire universe at a

given

instant mathematically platonia is

analogous to a configuration space a

structure used in physics to describe

all possible states of a system a

helpful way to imagine platonia is to

think of a shuffled deck of cards spread

out on a table each card shows a unique

arrangement of symbols like Spades or

diamonds just as each point in platonia

represents a distinct configuration of

the universe the cards do not follow a

specific order unless we impose one

similarly in platonia there is no

inherent progression from one

configuration to another

time as we experience it arises only

when we mentally arrange some subset of

these states into a meaningful

sequence one of plutonia key strengths

lies in its ability to address the arrow

of Time problem the mystery of why time

seems to move only in One Direction in

traditional physics the equations

governing fundamental processes like the

motion of particles are time symmetric

they work equally well whether time

moves forward or

backward yet in the macroscopic world we

observe irreversible processes such as a

glass shattering but never

reassembling Bar's platonia offers a

different solution the arrow of time is

not fundamental but rather an emergent

property it exists only in regions of

platonia where configurations increase

in complexity such as the evolution of

our universe we perceive time's

Direction because the configurations we

experience happen to contain increasing

patterns of structure and Order barbar's

platonia shifts the Focus From Evolution

through time to the geometry of

configurations He suggests that the laws

of physics may be understood better as

constraints on the shape of this space

of possibilities rather than as rules

governing temporal

change for example general relativity

could be reinterpreted not as describing

how SpaceTime evolves but rather as

defining the relationships between

different states in

platonia in this way the geometry of

platonia becomes the fundamental fabric

of reality with time emerging only as an

illusion a byproduct of the paths we

imagine through this

space Julian barbar's work on time as an

illusion echoes the ancient tension

between Kronos and tempus two distinct

concepts of time Kronos originates from

Greek mythology where it refers to time

as a Relentless unfeeling force that

governs the physical

world it is the kind of time that can be

measured seconds ticking away on a clock

days marked by the rising and setting of

the

Sun in physics this idea of time

underpins our understanding of motion

causality and

change equations from Newton's laws to

Einstein's relativity rely on the notion

of time as a parameter that flows

forward enabling events to unfold in

sequence Kronos is objective and

consistent providing a shared framework

for organizing the world and tracking

progress however Kronos is also

indifferent it does not care about how

time is experienced by individuals

whether you are bored or exhilarated

time measured by a clock passes

uniformly in this way kronus embodies

the mechanical Clockwork nature of the

universe where everything proceeds along

a timeline in different to human emotion

or perception in contrast tempus is

subjective time the time of human

experience it is fluid and malleable

stretching or Contracting depending on

move

focus and context think of how time

seems to fly by when you are deeply

engrossed in a conversation or how it

drags during moments of

anxiety Tempest is not concerned with

Precision or measurement but with

meaning it reflects the way we interpret

our experiences and weave them into

narratives that give structure and

significance to our lives Tempest is

also closely tied to memory and

anticipation

our understanding of the present moment

is influenced by memories of the past

and expectations of the future creating

a sense of

continuity in this way tempus allows us

to feel connected to both where we've

been and where we hope to go forming the

emotional underpinnings of stories plans

and

identities unlike Kronos tempus is

personal and unique to each individual

our experience of time is deeply

subjective shaped by the brain's complex

processes and influenced by attention

memory emotion and

Physiology although we take it for

granted that the present moment is

unfolding seamlessly in real time

psychological research shows that our

perception of time is neither precise

nor objective in fact every experience

we have is already slightly in the past

by the time we consciously register it

the brain's construction of temporal

experience introduces subtle delays and

distortions meaning that what we

perceive as now is a best guess

reconstruction of events that have

already happened the brain processes

sensory input touch sight sound at

different

speeds vision for example is relatively

fast while tactile Sensations such as

touch can take longer to be processed

and auditory signals are processed

differently still to create the illusion

of a continuous present moment the brain

synchronizes inputs arriving at

different times stitching them into a

coherent narrative however this process

introduces a delay often referred to as

the perceptual

lag by the time you become aware that

you've touched a surface your hand has

already been in contact with it for a

few

milliseconds experiments in Neuroscience

have demonstrated this time lag one

famous study conducted by Benjamin leet

in the 1980s investigated the

relationship between brain activity and

conscious

[Music]

awareness in this experiment

participants were asked to press a

button whenever they felt like it while

also noting the exact moment they made

the conscious decision to act

surprisingly Liber found that brain AC

ity associated with pressing the button

the Readiness potential began around 300

milliseconds before participants

reported being aware of their intention

act this suggests that decisions or at

least the processes leading to decisions

are initiated unconsciously with our

conscious mind becoming aware only after

the

fact other experiments have also

explored the subjective nature of time

perception

in a well-known phenomenon called

temporal binding the brain tends to

compress the time between two related

events such as pressing a button and

hearing a sound shortly

afterward this compression leads people

to experience the cause and effect as

occurring closer together in time than

they actually

did temporal binding reflects how the

brain works to smooth out discrepancies

making events appear more synchronized

than they really are which supports the

sense of a continuous flow of

time moreover the brain's clock isn't

perfectly uniform it can speed up or

slow down depending on various factors

such as attention emotion and

physiological

States for example when you are deeply

focused on a task or in a state of flow

time seems to pass quickly conversely

during moments of boredom or fear time

appears to drag in stressful situations

like an accident or emergency people

often report that time seemed to slow

down giving them more room to react

research suggests this experience occurs

because the brain's amydala which is

involved in emotional processing becomes

hyperactive enhancing memory encoding

and

perception as a result these moments are

remembered with greater detail which

tricks us into thinking they lasted

longer in addition to perceptual lag the

brain is limited by temporal resolution

which determines how finely it can slice

time neurophysiological studies indicate

that the brain processes sensory input

in chunks each about 30 50 milliseconds

long this discrete processing imposes

limits on how smoothly we experience

time for example even though visual

stimuli change continuously the brain

interprets them in these small intervals

somewhat like the frames of a

movie as a result rapid changes such as

a bird flying by are stitched into a

seemingly continuous motion though your

brain is processing them in discrete

steps this imperfect synchronization can

create interesting Illusions consider

the flashl effect a visual illusion

where a move moving object appears to be

a head of a flash that occurs at the

same time this illusion occurs because

the brain compensates for delays in

processing by predicting the motion of

the moving

object by the time the flash is

consciously registered the brain has

already updated its guess about where

the object should be causing the moving

object to appear further along its path

one of the more everyday ways you can

observe this delay in action is when you

stub your toe the tactile sensation of

the impact may seem to coincide with the

moment you feel pain but the two signals

touch and pain actually travel along

different neural Pathways at different

speeds by the time your brain assembles

the sensations into a coherent

experience some time has already passed

since the actual moment of

impact you are in effect always

experiencing the world's slightly behind

real time though your brain masks this

lag by aligning Sensations as closely as

possible the combination of these

effects perceptual lag temporal binding

emotional modulation and discrete neural

processing means that our experience of

time is far from the objective flow we

often assume time as we perceive it is a

psychological construction shaped by how

the brain integrates sensory inputs

manages memory and predicts future

events this suggests that the present

moment is an

illusion a kind of guesswork the brain

performs to keep our experiences feeling

coherent despite the underlying delays

and

inconsistencies if time as we feel it

stretching compressing slipping away

unnoticed or dragging endlessly is an

illusion shaped by our brain's imperfect

processing

and if even time as described by physics

measured in seconds flowing from past to

future is merely a mathematical tool

rather than a fundamental reality then

what is time

really if clocks calendars and timelines

are just constructs we impose on the

universe does time exist independently

at all or is it simply a convenient

fiction can we trust the feeling of now

if our conscious awareness is is always

slightly behind reality if the flow of

time is not intrinsic to the universe

but a product of human perception and

narrative what does that say about

causality memory and the Very idea of

change and if time is merely a sequence

of static moments as Julian Barber

suggests each existing independently in

a Timeless state so what is time

[Music]

time doesn't move the way we think every

moment in time is already out there we

feel like time is moving because we are

only able to experience one moment at a

time but in reality all a moments are

fixed and

unchanging it's like we are stuck in a

single frame unable to see the bigger

picture in this Theory the universe

isn't a place where things happen over

time it's a place where time itself is a

part of the structure everything is

locked into a four-dimensional block

past present future all fixed in place

your entire life from birth to death

already exist in the structure but they

are all out there

unchanging but what if everything is

already

written looking to the Future it's

conceivable that scientists will uncover

new insights that shed light on the true

nature of time with advancements in

technology and theoretical physics we

may eventually develop a framework that

clarifies its Essence whether it exists

independently is a dimensional aspect of

the universe or something entirely

different until then the ambiguity

surrounding time is a reminder of the

limits of our current

understanding rather than being caught

up in the debate about time's Essence we

might find more meaning in cherishing

the time we have whether time is real or

an illusion it's Central to The Human

Experience shaping our

relationships actions and identities by

focusing on the present on what we can

control we can live fulfilling lives

regardless of whether time exists as we

think it does

Нажмите на любой текст или временную метку, чтобы перейти к этому моменту видео

Большинство транскрипций готово менее чем за 5 секунд

Копировать одним кликом125+ языковПоиск по текстуПерейти к временным меткам

Вставьте ссылку на YouTube

Введите ссылку на любое YouTube-видео, чтобы получить полную транскрипцию

Большинство транскрипций готово менее чем за 5 секунд

Установите расширение для Chrome

Получайте транскрипции прямо на YouTube, не переходя на другие сайты. Установите наше расширение и открывайте текст любого видео в один клик — прямо на странице просмотра.

Добавить в Chrome — бесплатно

Работает с YouTube, Coursera, Udemy и другими образовательными платформами

Мгновенные транскрипции: Просто измените домен в адресной строке!

YouTube

←

→

↻

https://www.youtube.com/watch?v=UF8uR6Z6KLc

YoutubeToText

←

→

↻

https://youtubetotext.net/watch?v=UF8uR6Z6KLc

Транскрипция YouTubeГотовим результаты…

Транскрипция YouTube:Time is an Illusion : Past, Present, and Future Coexist!

AutoDub

Транскрипция видео

Вставьте ссылку на YouTube

Форма извлечения транскрипции

Установите расширение для Chrome

Мгновенные транскрипции: Просто измените домен в адресной строке!

Транскрипция YouTube:
Time is an Illusion : Past, Present, and Future Coexist!