Trukmė: 14:04
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See Quantum gravity video here: ltposts.info/title/tWOJp8KlZoOzu6Q/vaizdo-ra-as
3D gravity animation courtesy of: 1ucasvb.tumblr.com/ When Albert Einstein first published the Special Theory of relativity in 1905, he was ridiculed. People thought it was just too weird and radical to be real. Einstein wasn’t satisfied with his theory either, because the theory did not apply if Gravity was present or if the observer was accelerating. One day, while observing a window washer on a ladder near his patent office, he had a thought experiments.
He imagined what would happen if the worker were to fall. He put himself in the window washer’s perspective, and imagined what he would experience as he was falling. He realized that if he was falling, gravity would be the only force acting on him. He would be accelerating towards the ground, but since the ground would not be pushing up on his body, he would feel no weight. And this would be no different than being weightless in space.
In a way gravity and acceleration were different ways to describe the same thing. The way to connect gravity in the theory of relativity was through the idea of acceleration, and this became the basis of general relativity.
Einstein imagined being in a room with no windows, and a bathroom scale. It would weigh 80 Kgs, What if the room was on a space ship accelerating in an upward direction at 9.8 m/s/s. He would feel the same weight. There would be no difference
He imagined what would happen if he took a flashlight and pointed it from one side of the room to the other, as the space ship was accelerating upwards. If he had a ruler, he could measure the height of the light on the other side of the room. He realized that the height measured on the wall would be lower than the source of the light, because the floor of the room would be rushing upwards at ever faster speeds, as the light was propagating across the room. The light beam would appear to curve downward.
However, If you were on earth, and you measured the two heights, you may think that there should be no difference. That light should go straight to the other side of the room. Einstein thought it can’t be because it would violate the principle of equivalence. Acceleration of the room on a space should be no different than the room under the influence of gravity on earth. He realized that this meant light must bend in the presence of a gravitational field.
But light should be going on the shortest path. Then he realized, maybe the shortest path between two points is not a straight line but a curved line near gravity.
This was the key insight that Einstein had about gravity. But in order to express this mathematically, it required very complicated mathematics that even a genius like Einstein could not easily figure out. He contacted an old buddy from his college days, mathematician Marcel Grossman.
It’s important to note that the trampoline analogy you normally see on TV shows and youtube videos like this is a 2D plane used for visualization purposes only, but it is really in 3D.
In order for this theory to really be taken seriously, it had to make a prediction that could be tested, which was confirmed by the fact that it explained Mercury’s orbit which had been a mystery for decades because it had a precession. General relativity predicted exactly the precession that Mercury actually has.
But many skeptics still remained. The most fool proof confirmation came 4 years after he published it,when a team led English Astronomer, Arthur Eddington. in 1919, photographed stars near the sun during a total solar eclipse. He found that light passed near the sun was bent by the curvature of space due to its gravity. This is the moment Einstein became a celebrity.
#generalrelativity
#einstein
Why is this not just a distortion of space but also of time?...because special relativity says that light always moves at the same speed regardless of perspective or reference frame. This means that light will have the same speed in an accelerating reference frame as it will in a resting reference frame. But since the distance traveled by the beam of light in a gravitational field is longer due the curving of space, in order for the speed of light to remain constant, time itself must pass slower in the gravitational field relative to time in empty space.
General relativity does not answer everything. Although it tells us how gravity works, it doesn’t really tell us what exactly it is.
Komentarai
Arvin Ash
Watch the follow-up quantum gravity video here: https://youtu.be/S3Wtat5QNUA
Prieš 2 mėnesiusCarlos Santana
@Sam Samurai no no no
Prieš mėnArvin Ash
@Jack Strawb I did something like that here: https://youtu.be/S3Wtat5QNUA -- check it out and let me know if that's what you were looking for.
Prieš mėnJack Strawb
@Arvin Ash - If I might make a suggestion, how about taking Einstein's field equations, as at the 12:08 mark (so, a little more in depth that you go at the 12:12 mark), and doing one of your excellent 15 minute videos explaining to the intelligent layperson what each of the equation's terms means, however deeply you can go in such a video. I suggest this because videos on GR and the FE are too often either general to the point of being unhelpful or redundant, or they require a graduate-level knowledge of physics. Something in between might well appeal to a great many viewers--something that gives your viewers a way in to the math of GR. Best wishes,
Prieš mėnVZRed Gaming
Does that mean that: Around a black hole, due to super high mass, time would slow down so much that it is as if it doesn't pass?
Prieš mėn84#Beatles
Thank you sooooo much for your very accurate, precise and very simple explanation of Einstein’s theory. You really deserve more credit.
Prieš 2 mėnesiusAaron Gallagher
Question, if mass warps spacetime does time move slower on the surface of a neutron star? If so does time move slower inside a individual atom --maybe if you shrunk down smaller then an atom would the space time in that tiny region move slower but as you move just outside the atom spacetime is "straighter
Prieš 9 valP. Sohan
Only one question = what is space time
Prieš 18 valBenjamin Gal-Or
Cosmology, Physics and Philosophy | Benjamin Gal-Or | Springer//// Click name for new, dozen, online, free books at U-tube - all COLOR-illustrated with hundreds references - mainly in science - 2 as graduate and undergraduate CORE CURRICULUM CULTURAL COURSE BOOKS [CCCC]. \\\\ After the rain he collected them from under the trees //// and made mushroom soup with seeds, meat and pita, then lived 175 year and left us 3 major world religions that for 4,000 year most knowing not what to do with them, except the first mankind profession - no, that was not for the women, as you say, but for the men, to fight on almost everything and any idea, to covet, adopt, compete, steal, destroy, punish - which we call education. --- Try the healthy diet to live max. No need to create another set of new religions. Most agree, NO MORE.
Prieš dienąMade by Jimbob
The curve of space time is utter nonsense; space snd time do not have properties, and stop saying scientific theory, scientific theory requires an experiment, independent variable, dependent variable and controlled variable, stop spewing pseudoscience
Prieš dienąMade by Jimbob
The “ special theory “ is not a scientific theory. Gravity is also not scientific
Prieš dienąajee
What is space time ?
Prieš dienąArvin Ash
It is the background on which the universe exists.
Prieš dienąGONZALO PARRAGUIRRE
Science is cool.
Prieš 3 dienasJas hon
Is it possible that the gravitational force could be slowing down the photons? And does the force of gravity remain consistent throughout the universe, or does it differ where there is less matter and planet rotation? Did he come up with this conclusion on earth where light doesn't change speed relative to be on earth? Mabe light is relative to exactly what type of gravitational force it is experiencing at a given point in the universe, and would that make time different at different points of the universe?
Prieš 3 dienasNate Cooper
Imagine being that window washer and living your whole life completely oblivious to the fact that you helped Albert Einstein figure out how the entire universe worked.
Prieš 3 dienasPacaj Albert
z opačne strany 10, svetelných rokov planéta 🌏 vyzerá len bublinka vo vesmíre a vo vnútri vlnky ktoré podobné ako hviezdy stratia energiu tak sa vypnú zhasnu
Prieš 4 dienasJames Allen
So Einstein came up with his theory and the right wing haters said, “fake news.” People never change.
Prieš 5 dienųAllan Tidalgo
sir may I ask permission to use you video for informational purposes only for my audience?
Prieš 5 dienųAllan Tidalgo
@Arvin Ash Thank you sir, I will use the link
Prieš 3 dienasArvin Ash
What is your audience, and how would you use the video? You can always embed this video using Youtube's link.
Prieš 5 dienųSeep through the COSMOS
The best video on YouTube about general theory of relativity
Prieš 5 dienųspace melody
That window washer is the real cause of our curiosity now 😂😂....I won't write struggle instead of curiosity cz I love physics
Prieš 5 dienųIlham Abdillah Alhamdi
Oh god, I watch this as an entertainment
Prieš 5 dienųMatthew Sayewich
Understanding the foundations of general relatively, how can we predict the expectations of time and space travel. Specifically Mars space travel...what sort of life alterations are to be expected with extended space travel? Years verse, days.
Prieš 6 dienųTerrance Smith
Hey, I daydream about people falling off ladders too! Maybe I'm a genius!
Prieš 6 dienųArvin Ash
Well, just don't try that experiment on yourself.
Prieš 6 dienųArun Kumar
Wait for the birth of another Einstein who will propose Quantum gravity theory.
Prieš 6 dienųGary Morrison
Bingo! A lot of people say, “straight lines in curved space-time,” but you used a far-better phraseology: “ *the shortest path* in curved space-time.”
Prieš 6 dienųZeerak Samuel
Clocks on ISS are faster or slower? Slower.... right?
Prieš 6 dienųsilverrahul
They are faster
Prieš 6 dienųScott McGill
This is actually what Gravity is https://youtu.be/JJ4AgxZFMBI
Prieš 7 dienųJJP gaming
0:16 "how dare he challenge the greatest scientist that ever lived" Einstein: "bitch I am the greatest scientist that ever lived"
Prieš 7 dienųGjojx Duijv
I can't understand why you are telling the free fall story and suddenly going to spaceship story why I can't understand please help me
Prieš 7 dienųGjojx Duijv
@Arvin Ash thank you, I'm your big fan. I want to be like you.....what are the books you read and things you refer please help
Prieš 7 dienųArvin Ash
Because free fall is equivalent to being still in space. It might take a couple of viewing to understand. But watch the whole video all the way through, and I think it will start to make sense.
Prieš 7 dienųOldCountryman
No one understands how or why gravity functions, no one. They can only predict the effects.
Prieš 7 dienųArvin Ash
we know how, but not why.
Prieš 7 dienųStack Lord
The mean street regionally bore because windshield hisologically accept among a straight roll. sable, broken twine
Prieš 8 dienųGjojx Duijv
I can't understand please explain me. Why he is telling the light on spaceship is curving and in earth is not what does that means
Prieš 7 dienųEric Su
Some energy tensor of vaccum in general relativity is not zero. Detail in '82. Energy Tensor in General Relativity' on this website: https://sites.google.com/view/physics-news/home/updates
Prieš 8 dienųKent Ecklund
I'm a Newtonist. It looks to me that during the Solar eclipse experiment they ignored the fact the Sun has a huge atmosphere which can bend light the same way a lens bends light. Some people say Earth is in the Suns atmosphere, it's so big. Einstein's theories appear to me as still just theories. Einstein seems to see light bouncing around, and thinks it's actual time warps. I've never seen the proof. To me, all the experiments are not conclusive. I see many flaws in the Time/Space theory, time and space causing gravity. This doesn't explain why an object can change direction completely, then fall straight down to Earth. The theories don't explain so, so much. So many things. Like, there is always the Universe we live in which will always determine if an object is moving or stationary. We don't live in an isolated vacuum with no gravity. We will always have a position in the Universe, a position that shows our speed and movement. If a man falls off a ladder what's making him travel in the direction of the ground? No one pushed him in that direction. Why not just float in the air in space/time? What's making him travel along the space/time grid until he hits the ground? (I don't really want an answer to that.)
Prieš 8 dienųDale MacKnowed
Really great video, thank you 🙏🏼
Prieš 9 dienųAmadeus vercingetorix
One of the most influential people in all of history isn't that guy spitting out his Jewish science but that window washer 😂😂😂 we our understanding of gravity to him, way to not call in sick that day my friend
Prieš 9 dienųBananaArcher
Woah thx so much!!!
Prieš 9 dienųSome Guy
Thank you lots. It's really important to realize what simple thought experiments trigger puzzling physics like general relativity.
Prieš 10 dienųGered Lodi
The amazing alligator clasically pass because grandmother behaviourally squeal without a steep icicle. ill-informed, dirty shoe
Prieš 10 dienųCoeur
Aaah! That is why ships dissapear at the horizon! Now I know!
Prieš 10 dienųCoeur
So the light follows a curve while traveling to the wall because the earth atracts it. That can be measured! If I only had a scientist friend to do the experiment to prove me that, because I don't believe it and don't trust this and what the world is saying. I want to measure it myself! The two examples are not consistent. The rocket is MOVING with 9,8 m/s while "the science" says the earth ATTRACTS objects with 9,8 m/s. It is not exactly the same thing. Also, gravity really applies to light also like to any matter? If the velocity of light is consistent then the time it hits the wall is slightly after the time necesarry to hit the same wall in a straight line because it follows a curved path which is longer. That can be measured too!
Prieš 10 dienųgulshan kumar
I can't figure out ! "Straight line is not shortest path but curve path is shortest ?"
Prieš 10 dienųsilverrahul
Look up the flight paths of planes going across atlantic . You will see that they do not go in a straight line , but they curve because the curved path is shortest due to the curved surface of earth
Prieš 9 dienųBeverly Fisher
The quaint botany genetically juggle because step-brother chemically hope unto a calculating language. frantic, wistful competitor
Prieš 10 dienųLindsay Underwood
The female fertile bird finally clean because europe electronmicroscopically phone through a incandescent cellar. laughable, eatable shoe
Prieš 10 dienųMartin Lenz
"Its elementary my dear Watson!" -Albert Einstein
Prieš 10 dienųIan Bynoe
Nice
Prieš 10 dienų3LUE
Comparing to einstein we are dumb AF
Prieš 11 dienųDavid Kemball-Cook
Very informative video, thanks. I now understand general relativity (sort of)!
Prieš 11 dienųFlorescent David
"Time is slower as we move towards a black hole........ As black hole a very high gravitational pull it bends light towards it ........." Can anyone help me to relate those two sentences.. ...
Prieš 12 dienųJohn Lannikk
This is great learning Thanks. I think because all light and matter inevitably come from the infinite, then the closer we get to it the more it does not make sense because it no longer can be realized with our finite brain. Inevitably there comes a point when we have to let go, and I think that is the process that is happening today. We each have been given our own vehicle, but we are preoccupied with everything but looking through the windscreen.
Prieš 12 dienųJohn Lannikk
Would this also prove that light has no weight? Cos if it did then the measurements on either side of the room would be the same
Prieš 12 dienųVk rraw
How it is possible that a substance is able to press the fabric of space (aka fabric of space and time ) ...... Is there any theory related to it ? If yes ...is it proved
Prieš 12 dienųAllen Extrimadura
Why do I always feel science needs me for incomplete theories . Am I that stpid
Prieš 13 dienųRousseau
Nice change of watches ;)
Prieš 13 dienųJayNo2x
What if the universe just simply became sentient and decided to experiment on you
Prieš 14 dienųNick Hartwell
I was searching everywhere for my "aha, now I get this " moment and when he whipped out that DC/BA line graph I went OH SHIT! Thank you, Arvin!
Prieš 14 dienųMuhammad Asif Ansari
First time ,so many doubts of mine related these got clear.. thanxx👍
Prieš 14 dienųMuhammad Asif Ansari
Best video ever🙏🙏🙏❤️
Prieš 14 dienųDoug G
Good thing Einstein wasn’t canceled. Dodged a left leaning bullet
Prieš 14 dienųArvin Ash
He was actually being derided by right wing Fascists who did not like the fact that he was an "outsider" - an immigrant and a Jew.
Prieš 14 dienųRoll with Ethan
How can you bend time?
Prieš 15 dienųCodeName PizzaJr
I wish I was smart.
Prieš 16 dienųVedant Sridhar
Of course you are. My parents, teachers and friends won't believe me when I say "I understand general relativity perfectly". Btw I'm 14 years old and our Arvin Ash is the best teacher.
Prieš 9 dienųAryan Yadav
10:41, you entered the train😆😆😆
Prieš 16 dienųRajeev Srivastava
Excellent
Prieš 16 dienųFlame Fire Boy
Newton VS Albert Einstein i am for einstine if you think the same like the comment
Prieš 16 dienųArvin Ash
Both brilliant scientists, but if you ask my opinion, I think Newton had a deeper impact, and had fewer prior discoveries and shoulders of other scientists to stand upon.
Prieš 16 dienųCarl Bernardo
I’m here because elon musk appeared on joe rogan experience explaining that gravity is like a funnel
Prieš 16 dienųFrances Chewy Bear
Is Magellan the only company that sponsors videos of intelligence
Prieš 16 dienųMiusuka Madoto
Thumbs up for giving a glimpse of the 3D space curvature. Because the 2D version is very misleading. It makes you think that if you travel straight towards earth the curvature of space will make you go around it.
Prieš 18 dienųraj choudhary
nice narration.. !! amazing concepts !!
Prieš 18 dienųSista Joseph
The theory is relativity is wrong because masses are not bounded, they consist of a field that is is continuous into space, that is why space is curved. Read the explanation here: A Short Treatise on the Space Time Continuum by Piankh.
Prieš 19 dienųKeith James
If you want to know what it is like to live in a black hole, look around you. We ARE inside a black hole right now.
Prieš 19 dienųCarlos Metrebian
Very well explained! Thank you.
Prieš 20 dienųArgon
Imagine a distant space. Where there is no matter or planet to curve the space. Which means there will be no curvature in space. And then you put a massive object like sun in that region. And the space gets curved. Later you remove that massive object from there, and the space becomes as it was before. Does that mean there's some force acting on space too to regain it's orginal shape? Does it means the space is infact like an elastic, which stretches when force is applied and regain it's former shape when force is taken out?? If it so , then from where and in what manner the space gets it's elastic nature? Isn't there a force acting upon space to be neutral?
Prieš 20 dienųUros Petrov
You have a really long ladder right there
Prieš 20 dienųmirakl Utility
What is space made of?
Prieš 20 dienųmirakl Utility
If you had made this video sitting in space would it be of the same duration??
Prieš 20 dienųAlvin Ann
Did Einstein trying to say that we re on a surface?
Prieš 21 dienąMarc Rindermann
I usually don't react to ads in videos and I pay for Premium so that I don't get harassed by damn ads I am not interested in. However, I am interested in Magellan tv, but I've already got a subscription for curiosity stream with Nebular. So how does Magellan compare to Curiosity?
Prieš 21 dienąArvin Ash
I don't know as I don't have those other services. All I know is I enjoy Magellan. But, why not give it a try since it's free for a month, to see for yourself if you like it: https://try.magellantv.com/arvinash/ -- And report back.
Prieš 21 dienąsumeet
Did you notice the back ground music is actually Interstellar theme music arranged differently?
Prieš 22 dienasO
Just coming here after watching Interstellar
Prieš 22 dienasاحمد نوح احمد نوح
I want translate to Arabic
Prieš 23 dienasاحمد نوح احمد نوح
ممكن حضرتك تترجم الفيديو الي العربيه
Prieš 23 dienasSimon Wang
The light yoke fortunately harass because burglar chemically load plus a hoc sousaphone. inconclusive, clever roof
Prieš 23 dienasKarl Ghossein
Damn i regret not studiying enough im f stupide
Prieš 24 dienasNatanael Cunha
Thank you for the explanations! Relativity is so much clearer to me now as well as space-time bending👍🏻
Prieš 24 dienasEmErGe Channel
There's up and down in space? I thought up and down are result of gravity where we could determine the point of view central point
Prieš 24 dienasRieven Martis
What if a blackhole is a portal into the quantum field? The laws of quantum field are different there then the laws of psychics we know.
Prieš 25 dienųVivek Dandare
Man o man.... What a jam packed informational video.. Superb graphical representation as well.. Subscribed right away
Prieš 26 dienųArvin Ash
Much appreciated!
Prieš 26 dienųTom Space
https://www.youtube.com/watch?v=f7o0kah6soA The ELEMENTS in six dimensions, arranged by volume periods of nuclide mass averages
Prieš 26 dienųtyson tai
This is the math/science we want, not the science of many billions of years ago
Prieš 26 dienųgarçon inhabituel
I somewhere picked up that the so called “shortest path” is a curve, it’s called «brachistronome». I know it works on earth with it’s gravity, but I don’t know if it would work in space aswell, but I do assume. Would match up
Prieš 27 dienųMD Asad
Why light? light is made of photon which is Massless.... So that theory is bogus. We need other theory to explain this phenomenon. 😎🙏👍
Prieš 28 dienųZaahida Patel
I finally understood the diffrence between these 2 big theories. Although I find it quite absurd and illogical to compare time between earth and space using a clock ....... 😂 that's hilarious.
Prieš 28 dienųZaahida Patel
And Mr ash ...u explain things very well . Thanks a lot
Prieš 28 dienųiDOit Tinkering projects
SPACETIME, , a dimension envisaged by Einstein. What is it? But, I m not explaining it as Einstein suggested it to be. I m taking up his suggestion of this dimension and percieve it differently. Technically, its about fitting time into the geometry of the 3 dimensions of space, boggling our common rationale. How can this be? As time is kinetic, while space is static. Perhaps, if we revise our perception of space. That it is kinetic too. We can link up these 4 dimensions. How is space connected with time? As time is needed to move from one position to another. So, time can be related to space, and quantify it. If space is kinetic, then, its not absolute but eternal. Its expanding in tandem with time. At what rate? Let's define space as that volume within the edge of the universe that is lighted up. As speed of light is 300000km per sec, it means the diameter of spherical space is increasing at 300000km per sec. So, at 1 second of universe beginning out of first sight of light, space is 300000km across. N with each succeeding seconds., multiples of it. That the universe is 14 billion light years, it will mean, space is 14 billion light years across. Now that these 4 dimensions r at a common platform, we can visualise the SPACETIME dimension. Lets take this new reality and understand what's this relativity is all about. When we are still, then, in one second, light will hv speeded past us 300000km, n our space has expanded 300000km in diameter. As we progress to move towards the speed of light, our speeded reference frame is dilating time and compressing space. As our reference frame touched the speed of light, our time stopped, as its the same as the speed of light. Moments of time cancell out. And our space becomes absolute, no longer expanding. As we r moving at the same rate of expansion. An observer out of our reference frame will experience the regular movements of both time and space. When both meet, there ll be disparity in time observed. As for space, because its out of view, it will be unnoticed.
Prieš 28 dienųiDOit Tinkering projects
SPACETIME, , a dimension envisaged by Einstein. What is it? But, I m not explaining it as Einstein suggested it to be. I m taking up his suggestion of this dimension and percieve it differently. Technically, its about fitting time into the geometry of the 3 dimensions of space, boggling our common rationale. How can this be? As time is kinetic, while space is static. Perhaps, if we revise our perception of space. That it is kinetic too. We can link up these 4 dimensions. How is space connected with time? As time is needed to move from one position to another. So, time can be related to space, and quantify it. If space is kinetic, then, its not absolute but eternal. Its expanding in tandem with time. At what rate? Let's define space as that volume within the edge of the universe that is lighted up. As speed of light is 300000km per sec, it means the diameter of spherical space is increasing at 300000km per sec. So, at 1 second of universe beginning out of first sight of light, space is 300000km across. N with each succeeding seconds., multiples of it. That the universe is 14 billion light years, it will mean, space is 14 billion light years across. Now that these 4 dimensions r at a common platform, we can visualise the SPACETIME dimension. Lets take this new reality and understand what's this relativity is all about. When we are still, then, in one second, light will hv speeded past us 300000km, n our space has expanded 300000km in diameter. As we progress to move towards the speed of light, our speeded reference frame is dilating time and compressing space. As our reference frame touched the speed of light, our time stopped, as its the same as the speed of light. Moments of time cancell out. And our space becomes absolute, no longer expanding. As we r moving at the same rate of expansion. An observer out of our reference frame will experience the regular movements of both time and space. When both meet, there ll be disparity in time observed. As for space, because its out of view, it will be unnoticed.
Prieš 28 dienųRichard Rigling
Isn't the inertial acceleration field linear while the gravitational field is spherical? The strings supporting 2 plum bobs in the room would be parallel in the inertial field and converge in the gravitational field. One could thus distinguish between an inertial and gravitational field. Is space linearly "curved" in an inertial field and spherically curved in a gravitational field?
Prieš 29 dienųdanny harel
Hahahaha.....
Prieš mėndanny harel
Maybe grey ?
Prieš mėnCaleb Way
There are literally no words to describe how blown away I am
Prieš mėnharrynking777
The guy falling from the ladder would not feel a force other than wind resistance because gravity is not a force.
Prieš mėnCarl Anthony Cadalso
Science Is Interesting.
Prieš mėnerika vetrova
This video and the presenter is great
Prieš mėnyassine taddist
More on another theory: @
Prieš mėnyassine taddist
More on another theory: @
Prieš mėnTed Bates
That was excellent and thank you.
Prieš mėn#FF0000AnubisFace
time passes by the slowest when i hold myself in a plank position. So space must be bent like hell whenever i do that
Prieš mėnpaul L
I enjoyed the video. Can you explain to me why when I am standing on the earth I am being accelerated up. I know there is a normal force against the pseudo force created by curved spacetime. This acceleration shows up to me if someone falls off a building and so he is unhindered by force and sees the earth rushing up to him. what causes this expansion of the earth - electomagnetic? internal pressure?
Prieš mėn