Elevator Thought Experiment | Genius
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- Опубликовано: 24 май 2017
- Recounting a wild idea he had in an elevator, Albert Einstein pieces together the fundamentals of general relativity.
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Elevator Thought Experiment | Genius
• Elevator Thought Exper...
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![NoCap - Maliboo [Official Music Video]](http://i.ytimg.com/vi/FUV7E0QyniU/mqdefault.jpg)
It’s so amazing how Einstein could come up with these amazing discoveries using only his thought experiments.
@@swaminathan_r1 no, but every scientist needs to start with a hypothesis.
Keep in mind, thought experiments that is consistent with the mathematical modeling of physics that he understood well beforehand. Otherwise he would imagine lots of things in the wrong way.
Cause it's destiny more than that curiosity is the fundamentals
@@princestevenii.772 true enough
That’s not how physics works. It’s mostly math.
Think like a child where everything is possible.
No one reply to this so i did
@@justignoremycomments716 and that i ignored.
@Donald Trump bills and twitter
and then explain to yourself how they would be possible
Ok
Einstien: i have a joke
Me: ok
Einstien: time
Me: i don't get it
Einstien: exactly
Me: *wut*
Noice!
HAHAHAHA
hahhaha
I get it.
Imagination is more important than knowledge.
- Albert Einstien.
Acceleration and gravity are the same.
is that an actual quote from Einstein? Cuz that is bs! you need something to build on and the knowledge you acquired helps. Stupid!
he didn't say "knowledge is unimportant"! Plus, from what I remember, the quote ended with: "because knowledge has its limits...". It explains the relevance of his thought experiments ("Gedankenexperiment"), he predicted results by pure imagination that we could just proof and really know nowadays!
Knowledge is great and imagination is also great , but if someone had imagination + knowledge = creativity, ambition, genius, and greatness. Knowledge is tree and the imagination its leaves, knowledge without imagination = a dead tree.
Beautifully put with the tree metaphor. However, someone can't have greatness. that's a trait you can't have when your born. It's given to you, after you earn it
Hassan Ihssan well i have a bright imagination
1:20 the liftkeeper is from a time before Newton, so gravity doesn't affect him.
Einstein just imagined the scenery
@@notcool4314 Exactly, no lift falls free LOL
Ok
😂😂😂😂
lol
It's unbelievable how Einstein was so passionate about physics even though he never watched any space video on RUclips
Hahaha maybe that's why
😂😂😂
Thank god he didn't tell his idea to Edison
Adarsh Kumar Edison just care about money.
You can't invent something from nature - gravity, nor can you manufacture some gravity and sell in a market :)
Justin Tesla Chan That means you didn't understand General Theory of Relativity. With Elevator thought experiment, he showed how one can switch on and off gravity artificially. We do that all the time in space station with circular motion.
what do you mean switch of on and off ?
Actually, in relativity language, the space station isn't moving "with a circular motion". It is moving in a straight line in curved space/time. If it was circular motion there would be centrifugal force felt by people on board as a force away from the center. A ball being spun on a string is moving in a circular motion and you have to hold on (apply a force, an acceleration) to it to keep it from heading off in a straight line. That is totally different than a body in orbit around a body of a larger mass. The space station and the moon are falling (accelerating at 1 g) into a gravity well. On the space station it does not feel like you're moving in a circle. If the space station was moving in free space a light year away from our solar system it would feel no different on board. It would be a body moving in a straight line in uncurved space/time. That is the same as moving in a straight line in curved space/time.
👌👌
the real hero is the guy who invented the elevator before einstein's era.
lol
🤣it's not actually the elevator, he imagined falling from the roof of a house. In this documentary/series, the same thought experiment has been shown differently so that the falling from the roof need not be too violent to the viewers
@@GokuBlackEdits I didn't know that, wow!
Ok
How about who invented the Staircase or you want to date much more back like climbing trees.
Huge respect for sir Einstein, imagination is itself a very big tool to solve mysteries
The best feeling in physics is making sence of a concept through mind experiments and then applying math to a paper but when it comes to mathemtics the best feeling is when you try to approach a problem with different ways and in the end one of your stategies solve it
True, sometimes i feel stupid but when you find the answer in your own way with applied mathematics, you will feel how happy it is.
It turned me from feeling stupid into curiosity.
aftet watching this vid i m right now convainced that there are some people who were born to just put dislikes
Geni-us yeah well after* i don't know if there is smth else btw i'm not american and in my contry English is actually our third language
Geni-us moi aussi je parle français c'est en fait notre 2eme langue , tu sais je suis du Maroc ce qui fait que l'arabe is our real language btw again i have a serious problem which mixing languages i can start talking arabic puis français and finishing with english words so ...
which is *
They must be commerce students
@@unknownguy8614 That sentiment is a sheer disrespect for students who pursue commerce, they do value innovation and imagination.
1:55 only true genius observes dispersion of light along with this video
His idea that gravity and acceleration were the same thing was the beginning of his idea, not the end in itself. He soon builds on it and discovers that gravity is but a distortion of spacetime in the presence of matter - and the resulting field ultimately causes the acceleration.
True
R-mg= ma and mg- R= ma this is followed in elevator similar concepts that in pulling a roller is very easy as compared to push it reaction force supports in this query..
Technically relativity says that the only acceleration is from the floor. You're being accelerated constantly by the normal force keeping you up. The geodesic for an object at our speed and position relative to the earth is inward. When you free fall, you're finally just moving in a 'straight' line in spacetime. Our planet, meanwhile, is following the same 'straight line' in space that's curved by the sun such that the straight line maintains a mostly constant distance to the sun.
Gravity is not a force on an object, but a distortion of spacetime. This also explains why quantum mechanics is failing to find it, since they're mostly ignoring Relativity and looking for a force-carrying particle.
"Acceleration and gravity are the same"
Amazing how one can pull an entire theory out of a single line.
GENERAL THEORY OF RELATIVITY
" MATTER AND ENERGY TELL SPACETIME HOW TO CURVE AND SPACETIME TELLS MATTER HOW TO MOVE"
John Wheeler's quote is hard to beat.
How do spacetime tell matters how to move please explain im curious
oZzIbRiDgE GaMiNg I'll try explaining it with a E.g. Sun is a heavy mass which curves the space time around it... This curved spacetime around the sun dictates how matter surrounding it like planets move
Dhananjay Nanaware awsm pllz explain further
oZzIbRiDgE GaMiNg imagine space with no mass in it. This has a net called spacetime. It is perfectly straight until there is mass. Mass warps the spacetime around the mass making it curve. Mass will always follow spacetime so if something passes by it will move along the curve towards the other mass. This is what we call gravity.
Einsteins greatest gift was being able to take complicated, stupendous concepts and making them easy and simple to understand
I feel this is misleading as it misses or does not properly emphasize a major component of why this is important: The realization that if you didn't know what is outside the elevator, based on the acceleration you couldn't tell if you're on an elevator that is stationary on the surface of a planet and gravity is pulling you down, or if you're in a rocket ship in outer space that is accelerating and you therefore feel the elevator floor pushing on you. And therefore acceleration and gravity are the "same".
For example, if you were in a spaceship that was accelerating, and had a beam of light that started from one wall the elevator and ended on the opposite wall, the beam of light would curve slightly because during the time the light travelled, the elevator would accelerate and move slightly out of the way, and the beam wouldn't hit the spot on the wall that it would have if the ship wasn't accelerating. And then you realize that because acceleration and gravity behave in the same way, the same thing should happen to an elevator that is "stationary" and at rest on the surface of a planet. And from this you instantly get some clue about the fact that gravity bends light.
ok
He is correct.
U are correct...i was also feeling same ,how acceleration and gravity becomes same..how he deduced that from that experiment is not explained properly 🙄
Yes, thank you for emphasizing this.
he imagine that elevator located in outer space
the dude Einstein was talking was like: I have no idea what he is talking but I support him 100% percent.
"weightlessness is the concept potrayed here,its actually quite simple , we feel weightless when the acceleration due of elevator and acceleration due to gravity becomes equal"
Not with relativity. This clip didn't do a good job of showing why it's so different.
its more than that. Its the realization of the equivalence of gravity and acceleration. There is no experiment you could conduct in the closed elevator car that would tell you if you were in an elevator that was in space and accelerating towards the ceiling at 1g versus a stationary elevator car on the ground floor of a building on Earth.
I really wanna experience the era where men like this were alive, where we still didn't understand how the universe worked, It was all theories, talk, experiments, math, men like einstein!
We STILL don't understand.
We are beginning , but not yet starting, to understand knowledge.
We are about to scratch the surface . . .
No matter how many times i watch this, I get goosebumps every time!!
I have watched this video so many times, but every time I see it again I am awestruck on his imagination
this is ofc exaggerated
Einstein = genius therefore he says learn from yesterday live for today hope for tommorow the important thing is not stop questioning
That's so cool. I believe the same effect happens when your on a rollercoaster or one of those rides that spins really fast. It's quite fascinating and fun to experience.
Wow i saw dispersion at 1:56.
# shdow haha
@studyxgene See it at 1:57.
Indeed the light spectrum, technically perhaps
@@fannypack7705 kya gaali deta hai
You just want to sound smart dont you?
Clever Einstein,very genius
no u
*I watch these clips just to make my IQ jump before exams.*
😅
Same..😑😑😑😑
@@anurag5363 ln(😅) = 💧ln(😄)
@@anonymous-ik7li 👀
@@anonymous-ik7li You IQ = >100000000
How many times i have to cry.... With motivated, happy tears..
One word for national geographic: awesome
And then elevator crashed....
Ikr 🤣🤣🤣
That's gravity
F
sometimes when you are stuck in some problem think simply may it bee silly but that was how great ideas were formed
0:47 Ah here we go again
Its so fascinating to see how he used to think... He is becoming an inspiration for me now...!!
How to lose weight fast?
My gym trainer: Diet + Workout
Einstein: Travel through Lift from 20th floor to ground floor
The acting on this is just stunningly perfect 🎥😎😁👏🏻👏🏻👌🏻👌🏻👌🏻👌🏻👌🏻👌🏻
I love the fact that I understood almost everything he said😂😂
Anyone with above 6th grade education should
@@cherrynado woah thats not it.
@@ifuwinuwin5923
Technically you are at rest if you fall und the earth is accelerating towards you. It's hard to imagine but it's just like that. You accelerating in a spaceship with one g or standing on earth is physically the same.
@@jonathanlange1339 inertial frame of reference* not rest. nothing is truly at rest. we all have to move at the speed of causality, c. the earth accelerating in space doesnt create gravity. its the earth's mass that bends spacetime. the propagation of earth through space does not create gravity. you cant think of it as the earth accelerating into you, because on the opposite side of the earth, it propagates the other direction so you wouldnt be bound to earth. instead it is just you moving at the speed of causality, c, in a straight line (towards the earth's center), with the only thing stopping you is the earth's surface, which we feel as g.
@@BrendonCap when i watched the series as a 10 year old, i was understanding everything
Beautiful wonderful!!! I really enjoyed this please give us more: perhaps about Tesla and Newton and Galileo 💪🏻😎👌🏻👌🏻👌🏻👌🏻👌🏻
Brilliant explanation!!
i broke my phone seeing this, it was like i was in his house watching him and crying with happiness!!!
When I have a idea
I could not think of an experiment
When I have idea of an experiment
I don't get thought related to it
🤐
It would be of immense pleasure to see genius in youtube please make it available :)
You wanted to see me?
Quite often the most simple thing we all thought very mundane, holds the brightest star of the dark sky.
We like to just glanced over it, and never took a second time to look back.
That's why "I should've seen it before" came.
This got me to science
Him and his hypothesis are so brilliant.
Actually, isn’t it the strong or weak force of the atoms/particles of the elevator that pushes you up if the elevator moves up, and the gravitational force that pushes you down when you stand in the elevator. So both forces may feel the same, but they don’t have the same cause.
Einstein's eventual realization was that gravity isn't a force. You're still thinking of Newtonian gravity.
He looks like sherlock Holmes in his mind palace.
N+ma=mg and when the string of the lift breaks...a gets equal to g I.e. a=g..N(apparent weight)=mg-ma or in this case N = m(g-g) which is weight is equal to=0 therefore we don't feel weight
Imagination is everything 🙂
I Like Albert Einstein forever
Very obvious but still magnificent.
The funny thing is that I stumbled upon this after studying about this very concept : non - inertial frames.
😅
From this simple postulates of gravity and acceleration being the same, Einstein predicts that light can also be bend by gravity.
Weightlessness explained!!
Einstein is a theoretical physicist. He doesn't need to conduct experiments to prove something. He plays it on his creative mind and makes a little bit calculations. Science is beautiful.
Imagine the actual happiness on his face
Sir Einstein is one of the greatest scientist ever!!
General relativity!!! ♡
I have thought about the same thing when I was a kid, whenever I used to travel by plane.
One among many examples of Einstein's thought experiment
I AM NOT GOING TO FORGET THIS VIDEO TILL MY DEATH.
29/11/2017 6:11 P.M
Still remember?
You still alive right?
Yea hes dead
RIP ScienceFactz
For anyone wondering, he is still alive. Just look into his channel, the last video was uploaded on Feb 12 2018
"...alright then I'll stay with you professor Einstein!"
Now I know from where we got the elevator problems....In Mechanics-I..
Are these clips from a movie or series? Somebody please help this looks so interesting all these different clips and trying to find out where it’s from and watch it all
It's a TV show. It's called "Genius Einstein".
I love EINSTEIN. LOVE FROM INDIA 💖💕🇮🇳🇮🇳🇮🇳🙏🙏🙏
today understood how einstein sir got to know that acceleration and gravity are same yes its right now if lift is going up R-mg=ma , and when lift going down mg-R=ma now there is no touch einstein sir shoe with lift base means acceleration net comes out to be gravity its like free flowing body
Please upload complete sequence
Einstein explains class11 concept easily
He is a genius!
Imagine a genius guy before Einstein couldn't figure out this just because the elevator was not invented.
*Only through Imagination*
I am a mad I read all the comments of this video because they are so interesting and there is not doubt we are having many geniuses in the world
Einstein was a poor student but a brilliant THINKER. This documentary on him is a message for the brilliant STUDENTS that they 'may not' be good at imagination.
He was actually a brilliant student too. He usually gets 6 sometimes 5 for maths, which back then means excellent. He sucked at math was just a tale.
@Alfonse Bun Nowadays you have all the tools to learn. Even if he had a great mentor, it doesn't mean anything when in the end it all come down to us and in this case Einstein. Like a prodigy can see things further in some area and not being capable to see new things, Einstein was the reverse. However people always forget that Einstein always trained his mind. Reading books, discuss with friends, etc. He did study to reach were he was at. He might had not been as hardworking as Edinson or Tesla, but he did surely hardwork.
Never knew someone who did well in prison, oh sorry i meant school
Einstein was an average student at best at least according to his grades in this link. But he always had trouble listening and did things his own way.
It means you were not a good student and just having dilasa from this
For every action there's an opposite equal reaction and Einstein explains it briantally.🕵👍😇✌⚛🚀🔭
That was explained by Newton tbh
@@jaydeepgamit8506 😊
So underated series on the internet
this was not the purpose of the elevator thought but still a cool lecture on newtons thoughts on gravity
Newtons third law - For every action there an equal and opposite reaction
But acting on different bodies
Einstein sounds like Freddy Mercury
It is so simple and striking because everyone knows F=m•a
Which have a consequence that every rigid mass object attracts every other rigid mass object with a *constant* acceleration, that's gravity
That's not what that equation say m8.
The happiness I experience when I solve 1 problem in math is the same XD
THIS IS THE CHAPTER 4 OF CLASS 11 NLM
Right , but he is "discovering" What we are learning 😀
@@shaanmenaria7318 yes true
Einstein = Genius 😉
nope rather GENIUS = ALBERT EINSTEIN
Isaac Newton =god of physics
@@harshitagrawal9357 nope.
I think you really don't know real Geniuses... S. Ramanujan and Shakuntla devi.. ❤️
What about galileo?
Haddd hee yaar comparision karnee kee adat kahi nhi jaegi ham indians kii😂😂
I'm sorry for my confusion, but what did people think gravity was before einstein related it to acceleration? didn't newton already explain gravity and gravitational force centuries ago?
Newton did explain that there is some kind of invisible force which was called "gravity" that was causing the planets to stay in orbits and made everything fall on Earth. But he couldn't properly justify that what that force is, why is it happening and what causes it? Therefore, people just thought that gravity is an invisible force and is making everything fall and making planets in orbit. Einstein came along with his general and special relativity and told us that gravity is not a force, but rather it's just the bending of space-time around the presence of heavy matter.
Newton thought it was a force. Einstein said it's not. The only force is the force of the ground keeping you in place. There are great explainer videos if you search the key word geodesic
I regret , not watching this series during my high school Physics days😪😁😁
Amazing. This is the best video I could use my resources and see.
@national geographic credits to you
Real Genius always make everything praticle and they just not read science they live SCIENCE.
Non sense, u cannot determine everything through experiments
Real genius, can do experiments in their mind itself, which is more fantastic!
a = g(acceleration due to gravity)
Weightlessness. The normal force would be zero as the downwards acceleration of the elevator increasead in magnitude and equated the magnitude of earth's gravity acceleration. This is incredible!
Man, that part after the video's over is LOUD. Well, relative to the rest of the video, at least.
Ramanujan, the phenomenal Indian scientist did equally amazing things. Ramanujan is a legend, an icon of intelligence with utter humility.
and here you are bragging about his humility...if he was humble he would completely despise you...Indians just want to brag everywhere...
Ramanujan was not a scientist. He was a mathematician.
einstein in a descending elevator: *builds an entire computation for a theory*
me when elevator descends: mum come pick me up im skerd
While watching this video i was Learning Laws of motion The lift concept while accelerating
When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity. i have a doubt if gravity and acceleration are same is gravity also equals the rate of change in velocity??
I think that it was because of inertia that he felt like that. The elevator moved too fast and Einstein’s inertia made him stay where he was, which felt as if he was floating. And, when the elevator was rising, Einstein’s inertia mad him stay where he was, but he felt the floor because the floor was rising.
Possible.
The equivalence principle states that it is locally impossible to determine if one is accelerated or in a gravitational field. So if you are inside the elevator you won't know what is accelerating you.
the thing is the elevator and einstein are both accelerating at the same rate, that is "g" so if everything which is accelerating at the same rate as you then you would feel as if you were in a inertial frame
@@theboiyoulove5124If you are accelerating, you would not feel as if you are in an inertial frame, even if things around you are accelerating at the same rate because there would be an inertial force on you
I'm confused. wasn't the idea that gravity results in acceleration between masses already thought up well before Einsteins time by someone, whom I believe had the name Isaac Newton.
That’s the difference, Newton’s thought of gravity as a force of attraction between two masses. But Einstein theory of general relativity tells us that gravity is simply an acceleration, produced by the fact that matter curves spacetime.
@@ahmedalshammari1851 yeah newton was the what and einstien is the how. The video just doesnt do a great job of explaining the relationship between the two theories.
U are correct...i was also feeling same ,how acceleration and gravity becomes same..how he deduced that from that experiment is not explained properly 🙄
@@ahmedalshammari1851 thanks for nice explanation
Newton treated it as a force. The force being proportional to the masses of the two objects and proportional to the inverse square of the distance between them. Einstein on the other hand treated it as a curvature of spacetime caused by masses. The apparent force is just the result of the objects moving towards one another along the curved spacetime. To quote John Wheeler: “Mass tells space-time how to curve, and space-time tells mass how to move”
Why is the elevator boy glued to the elevator, during acceleration upward, and during downward falling. is he a super being.
Whiteout any source of present technology Albert Einstein achieve something almost the inimaginable for normal common people.
every knowledge come from imagination
Flat Earthers be like: :"SEEEEEEEEEEEEEEEEEEEEEEEEEEE earth is moving upwards, even Einstein said that"
If time-space was one-dimensional.
Greetings from the LooseNatural farm in Andalusia Spain where we currently live through a drought and we can do with some weather genuis
Gravity isn't a force, it's a product of spacetime bending