Why Gravity is NOT a Force

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Veritasium

22 päivää sitten

The General Theory of Relativity tells us gravity is not a force, gravitational fields don't exist. Objects tend to move on straight paths through curved spacetime. Thanks to Caséta by Lutron for sponsoring this video. Find out more at: www.lutron.com/veritasium
Huge thanks to Prof. Geraint Lewis for hours of consulting on this video so I could get these ideas straight in my own brain. Check out his FIpost channel: ve42.co/gfl or his books: ve42.co/GFLbooks
Amazing VFX, compositing, and editing by Jonny Hyman
2D animations by Ivàn Tello
Filmed by Steven Warren and Raquel Nuno
Special thanks to Petr Lebedev for reviews and script consultation
Music by Jonny Hyman and from Epidemic Sound epidemicsound.com
Rocket made by Goodnight and Co.
Screen images in rocket by Geoff Barrett
Slow motion rocket exhaust footage from Joe Barnard at BPS.Space
fipost.info/camera/ILl8ozWuxnFYXIe2svjHhg.html

Kommentteja
Veritasium
Veritasium 16 päivää sitten
Here's a question I've seen a lot in comments: OK, I'm accelerating up but then shouldn't someone on the other side of the globe fall off? No, here's why: Either watch again from 8:28 or read what I've written below... Spacetime is curved - it curves the opposite direction on the other side of the Earth. Neither us on this side of the Earth nor they on the other side are changing our spacial coordinates - we're not moving up, they're not moving down - Earth isn't flying into one of us. BUT we both ARE accelerating. In curved spacetime you have to accelerate just to remain stationary. The traditional definition of acceleration is something changing its velocity. In general relativity you have to embrace a new definition of acceleration: it means deviating from a geodesic - not going on a straight line path through spacetime. Near the Earth a geodesic is a parabola so unless you're moving in a parabolic arc (like on a zero-g plane) you are accelerating. This definition is the same as the old one so if you're accelerating in deep space then your velocity is changing. *BUT*... if you are near a large mass you are in curved spacetime, now acceleration your velocity is changing. You can stay stationary relative to Earth's surface and still be accelerating. This is because your acceleration should be measured not relative to the Earth's surface but relative to free-falling objects - they are inertial observers. Imagine this - I'm in deep space and I make horizontal rows and rows of stationary golf balls. Then I hop in my rocket and accelerate up through them. Just think about what that looks like. Now my rocket is back on Earth just sitting there. I freeze time for a sec and make horizontal rows and rows of golf balls up into the atmosphere. Now unfreeze time. What do you see? If you just look at the golf balls and the rocket ship it looks the same as the situation in space where the golf balls were stationary and the rocket was accelerating. Einstein's point was the golf balls have the better claim as the "stationary" thing since their experience is just like the golf balls in deep space - no forces experienced. The rocket on Earth is just like the rocket in space. It feels a force and hence an acceleration.
D D
D D 2 päivää sitten
@JAW BL4Z3R Space time curvature causes the effect which is called gravity force in Newton's law of gravity.
adorable
adorable 8 päivää sitten
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adorable
adorable 8 päivää sitten
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adorable
adorable 8 päivää sitten
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adorable
adorable 8 päivää sitten
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djackio
djackio 3 minuuttia sitten
God damn. These past couple videos expand and contract my mind. I’m going to need to watch this a few more times.
KuliJens
KuliJens Tunti sitten
I think I understand what you're saying. Just to be sure... You're saying the people in Australia are being sucked to the earth by the vacuum left in space as we are accelerating upwards?
GENO GURIRAB
GENO GURIRAB Tunti sitten
If I asked now ..if earth is accelerating up and I travel on earth parallel to it dose it mean my movement is on an angle ? Relatively to space or just on an angle?
B. Xoit
B. Xoit Tunti sitten
It seems as though "acceleration" has come to mean two different things. One is what an accelerometer would measure. I want to call this "felt acceleration". And the other is the second time derivative of position as you would measure it with measuring sticks, or optical triangulation, or whatever. And having one word have two distinct meanings confuses people.
scno0B1
scno0B1 Tunti sitten
veritasium my dood. you should always test if your cables are live after you've tripped the breaker.
MrPetari
MrPetari Tunti sitten
Just another case how someone takes lot of effort to explain something absurd. At start I did not expect it - saying that Einstein's "happiest thought of life is man falling from roof" - dear God, another sensationalistic claim about famous person - was he really ever said it, with exact those words ? Yeah, I say that Einstein's certain theories are absurd, but he took care about what and how said. So, why no mention about air in case of falling, what will make that acceleration lower as speed relative to air (and ground) increases ? I would say that Einstein liked idea of man suffocating from lack of air while falling from roof in huge vacuumed dome :-) OK, let's be serious. Gravity is not force, that's the claim, and because it acts exactly like force, we need explanation for that - and so comes 'curved space' and other crap. The real problem is that Einstein (and others) did not understand really what is space, what is time . And yes, there is simple explanation for them. For the end: just because I can not understand it, it must be not something genial - plain wrong. When I was about 15, someone said that only 10 people on Earth understand Einstein's theory of relativity . Then one from our class, who was poor with physics said 'I'm one of those ten' :-) Yeah, and now he is a lawyer :-))))
041 Shyam Sunder Upadhyay
041 Shyam Sunder Upadhyay 2 tuntia sitten
For a second i thought you are a Astro-Physicist but you're an engineer. The explanation, direction, oevrall content is awesome. Keep it up bruh.
Chris B Kirov
Chris B Kirov 2 tuntia sitten
11:00 “My dear, here we must run as fast as we can, just to stay in place. And if you wish to go anywhere you must run twice as fast as that.” ― Lewis Carroll, Alice in Wonderland
Robert Justin
Robert Justin 2 tuntia sitten
Amazing how gravity doesn't work on a helium balloon
rent a shill
rent a shill 58 minuuttia sitten
helium is lighter than rest of the air. so gravity pulls air more than helium. which makes helium get higher. because of all the air that wants to get below the helium. its bouyancy... same reason why objects lighter than water float if you remove constant acceleration rate, bouyancy doesnt work
Robert Justin
Robert Justin 2 tuntia sitten
It's not kind of an illusion. It is. Because it's not real
Nikioko
Nikioko 2 tuntia sitten
A plane always travels along a great circle.
Rahul Bajaj
Rahul Bajaj 2 tuntia sitten
If i jump inside a running train y am i not forced backwards ?
B. Xoit
B. Xoit 2 tuntia sitten
Given that energy can take different forms, what do all the forms have in common that results in adding curvature to spacetime?
wasey shariq
wasey shariq 2 tuntia sitten
Blown, blown, mind blown
Nedeljko Zdero
Nedeljko Zdero 2 tuntia sitten
So the amount of G we feel on other planets would be like some kind of equasion of the mass that the object has (the more mass it has the more it bends spacetime) and the rate it accelerates in the universe at? I DON'T NEED SLEEP I NEED ANSWERS!!!
COMMUNICATION IS EVERYTHING
COMMUNICATION IS EVERYTHING 3 tuntia sitten
This is technically incorrect as Oldand Dilis shows when the video proposes that you can be in a state of non acceleration it is false matter and time ONLY EXIST BECAUSE OF ACCELERATION. Einstein showed that space and time are inseparable and this kind of analogy is doomed to confuse more than make anything clearer. The Earth like all time(flow) and matter only exist because of movement just like a vortex in water flowing down a sink only exists because there is movement. If you say the Earth or any object doesn't move only time moves it is a nonsense because one cannot exist without the other. It is like saying "Ok lets analyse a vortex created in water emptying down a sink but we will have the vortex remain still and then we will study the flow", Understand now? It can't be done if you stop the vortex there is no flow(time) if you freeze the vortex in a moment in time then it becomes ice and there is no flow, essentially time (flow) stops in the vortex also, you CANNOT have one without the other Einstein made this clear and Oldand Dilis makes it even clearer in his Theory of Everything. He proves that the Earth is not solid it is only waves flowing through spacetime, spacetime is not metaphorical it literally is a physical fabric/lattice through which waves of energy stuck in vortexes (matter) moves through, I'm telling you, you gotta read Spring Time Theory it is frikkin NUTS how many problems this guy has solved and he doesn't even have any qualifications, using an inequality that beats the measurement problem and cracks the double slit experiment he has basically completely rewritten physics using little more than lower high school maths and science and he is correct, while he doesn't use standard mathematical notation all the time his logic is impeccable! it is brilliant, he is definitely Einstein's successor, the sooner academics get to grips with what he is saying the better doubleslitsolution.weebly.com/springtimetheory.html
Cyl
Cyl 3 tuntia sitten
But I do feel weightless occasionally. I'm actually watching this video on an exercise ball, wondering how it would feel if I attached a bad dragon to this.
Clemence Ronald
Clemence Ronald 3 tuntia sitten
Thanks for the great explanation. I always thought more or less the same but my mind still can't explain it correctly due to our newtonian theory adaptation. Top notch content!
Jerome Morley Larson Sr EAIA
Jerome Morley Larson Sr EAIA 3 tuntia sitten
Wonderfully convoluted explanation for the absurdly simple = space is expanding at an accelerating rate = the atom is expanding at an accelerating rate because all things are fractal, space is just a huge atom = big stuff like earth have more mass than little stuff like me so earth expands faster than me and i feel a push under my feet - the question is what is causing this accelerating expansion? My answer is that TIME is causing the expansion - TIME cannot exist without accelerating TIME is omnidirectional, it pushes from the inside and from the outside - such that two objects in space push toward each other even as they accelerate away from each other - AND, as they near each other, a “shadow” of the omnidirectional TIME is created between them causing an attraction relative to size and speed.
The Oculist
The Oculist 3 tuntia sitten
LOL, "it's all relative..."
EvlEtna
EvlEtna 3 tuntia sitten
How does this work in regards to the measured gravitational waves detected in 2015? Is it instead the detecting of space-time curvature rebound?
naruto uchiha
naruto uchiha 3 tuntia sitten
First thing that came to my mind as a FRIENDS fan that Phoebe doesn't believe gravity XD!!
noah wolff
noah wolff 3 tuntia sitten
This was the wrong video to watch right after my wake and bake
Baraborn
Baraborn 4 tuntia sitten
First Pluto. Now Gravity... right when I thought I was educated. I read an article by an Indian scientist saying that Gravity = ElectroMagnetic force, but this guy is saying Gravity = N/A. Wow.
vaporizer1000
vaporizer1000 4 tuntia sitten
good idea but actual for the world without matter. gravity is a physical phenomenon and in the world of physical mechanics is able to show a certain force interaction. the spring for example has no force, but under certain conditions can perform work and be a force accordingly. for gravity the appropriate driving force is matter. same with water in the ocean water also not force, but ocean can accumulate and give energy. any force on earth has a similar nature even burning. And it all starts with the fact that there is matter. and matter is actually energy or force if we evaluate everything in terms of elementary particles.
An Ton
An Ton 4 tuntia sitten
Gravity is not a force. But is magnetic force actually force? Or is it just curved spacetime for iron?
m k
m k 4 tuntia sitten
Amazing!! But I still don't get the answer to this question at 9:58 ( You need to accelerate just to stand still) I mean mathmatically in the equation sure it is clear but how is that implemented in the real life!! The earth is round and everyone on its surface is accelerating then in what direcrion the earth is accelerating? The space ship example doesn't clarify this since its accelerating to a one clear directin.
Neil McDermott
Neil McDermott 4 tuntia sitten
So how do radio waves escape a gravity well e.g. a black hole? Are they not effected by the curvature of space time? Or is there another external force acting upon them? But then wouldnt that force be unaffected by the bending of spacetime?
Nicholas Taylor
Nicholas Taylor 4 tuntia sitten
If the gravitational field were completely uniform, it might as well not exist. However, where there are material sources, an extended body must feel tidal ‘forces’ through differences in the geodesic paths of its parts, despite every part being momentarily in its own inertial frame of reference. Most extended bodies are held together by electromagnetic forces though self-gravitation could do the same. If we neglect the contribution of self-gravitation, would gravitons still be exchanged in the process of redefining the momentary inertial frames?
burbleurble
burbleurble 4 tuntia sitten
How can something that isn't there, be curved?
Pranav Patel
Pranav Patel 5 tuntia sitten
Yaa Yaa, I exactly know what u r talking about. Not complicated at all.
JAF 34
JAF 34 5 tuntia sitten
OK I have to ask, because Im not a scientist. So in a nutshel. 1. If gravitation doesnt exist as we know, does it mean that the mass and speed have same "effect" what we called now gravitation, right? Or is there some another additional things what have effect on gravitation? Like time? 2. So gravitation is a mix of different forces in a multiple frame of reference, right? 3. Why supermassive blackholes have so massive gravitation field? Is it just because their are sucking in all these mass around? Or is there any other force what make them so strong? Cheers.
Ali Ahmad Ijaz
Ali Ahmad Ijaz 5 tuntia sitten
How would this apply to blackholes.
Visa
Visa 5 tuntia sitten
I actually had always wondered how light could be affected by gravity if it has no mass, but this explains that as well
1luv4j
1luv4j 7 tuntia sitten
He is wrong farmon fields are 2d and 5d bubbles of the membrane theory. Einstein is dumb autistic. Get a clue so am I. Science must always seek greater undertaking of measurements and errors in your empirical theories. Like tessler said he is math not science. Math is language so its limited in understanding. Find your inner intuition and meda phisics and ask with inn your cpu in your chest the merkaba. Did you know it changes reality?
1luv4j
1luv4j 7 tuntia sitten
The planit is spinning and moving at 1000 miles and hour. I am not moving I fall now planet going hit me not ne hit the planet same as in space. So the core has hydrogen attraction in q resonsons of our star. And we also in 7 farimons of bubbles holding gases the air water because of the ferma effect. The core has di nitrogen 5d crystal that makes the nitrogen part of the planets ferma gravity waves there bubbles not waves or lines a tora field. Working theory anyone want join on this?
dale walters
dale walters 7 tuntia sitten
so are you saying that there is no field of gravity extending to infinity unlike the magnetic field or the quantum fields for electrons and quarks?
Landon H
Landon H 8 tuntia sitten
I'd say forget about all of your general relativity theories and equations, drop a bowling ball on your foot, then tell me gravitational fields don't exist.
Rahul Ravanan
Rahul Ravanan 10 tuntia sitten
7:45 R.I.P #அருட்பெருஞ்ஜோதி 🔥
Fenrisulv987
Fenrisulv987 10 tuntia sitten
Just wait until flat earthers get their hands on this. Gravity isn't even real, see!!
Rock girl
Rock girl 10 tuntia sitten
the thrusters would propel you in front, but there is nothing behind you so you can't propel yourself, or am I wrong here?
Mario Velez
Mario Velez 10 tuntia sitten
Flat earthers: so we were right? Veritasium: well yes, but actually no
Rock girl
Rock girl 10 tuntia sitten
Sooooo, what do we do about flat Earthers..?
Ali Tahrei Sh.
Ali Tahrei Sh. 11 tuntia sitten
What force make us/things to move on the curve of the spacetime?
John Carter
John Carter 12 tuntia sitten
Nice video learned a lot but its not necessary to clown around so much its a bit distracting
crazy_mind1262
crazy_mind1262 12 tuntia sitten
Sorry but Vsauce did it better
Marc Gosselin
Marc Gosselin 12 tuntia sitten
If I jump on the other skde of the globe, why don't I free fall then?
Broken teletooby
Broken teletooby 13 tuntia sitten
Ok but how do you do that I'm bad at editing
Adam Baum
Adam Baum 14 tuntia sitten
Gravity is not a force, but space has a force, "Space Force"! TRUMP 2020
Oliver Hennessey
Oliver Hennessey 14 tuntia sitten
So is it possible for you to not be accelerating even though your spatial coordinates are changing at inconsistent rates.
redandblue323
redandblue323 14 tuntia sitten
Is that the same rocket ship you could dig out of the ground in Super Mario Bros 2?
Marie-Pier Neault
Marie-Pier Neault 14 tuntia sitten
I have a question regarding Einstein equation. The position formula propose by Einetin is equal to the acceleration minus this fancy Einstein's tensor which means in order to stay at rest one would need an acceleration to cancel out with the contribution of gravity (the tensor). This confirms that there is an acceleration right now 'the normal force' pushing us up (where I am assuming that its magnitude would still be equal to 'mg' as when dealing with the Newtonian theory) while the tensor has pretty much the same magnitude and therefore we end up with zero-displacement. But if we are not moving due to the acceleration of Earth pushing us then it seems to me that the charge particle on the table 'at rest' would not be radiating since although it has an acceleration, it is not moving!? I feel like there is something I am not getting right. Thanks in advanced for your help
Boss Rooster
Boss Rooster 16 tuntia sitten
Never heard such rubbish
Flame P
Flame P 16 tuntia sitten
As a Harvard Neuroscientist, here's another mind-bending gravity-related thought. When you rotate your head, you are NOT in control of the primary directionality of your eye movements under most circumstances. Try this. Keep your head still and look at your finger while you shake your finger left and right; your finger will look blurry due to motion blur. Now, instead, keep your finger still and look at it while you simultaneously shake your head left and right, which will demonstrate - in this situation - that you are still able to maintain a stable image of your finger. This is because your gravitationally-influenced sense of your head in space - your vestibular system - has a hardwired reflex to move your eyes in the opposite direction of your rotational head movements. This vestibular-ocular reflex (VOR) ensures automatic dynamic stabilization of images during head movements. You are not consciously doing this, and you can not consciously override it. The VOR is truly a reflex and, interestingly, does not depend on vision. During head movements, you will still have a strong VOR if you are in the dark or if you have your eyes closed. Your VOR originates from your vestibular system, which is located in your inner ear right next to your cochlea - your organ of hearing. Your vestibular system for rotational head movements consists of a series of three fluid-filled semicircular canals that have little "hair" cells inside the canals. When your head moves up-down (pitch), left-right (yaw), or shoulder-to-shoulder (roll), fluid inside the corresponding semicircular canal flows. This head motion-induced flow bends the hair cells within the canal to ultimately send electrical impulses to your hindbrain. These electrical impulses - encoding head movement - then talk to parts of your brain controlling eye movements, which connect to your eye muscles to reflexively move your eyes in the opposite direction of your head movement. So be thankful that your sense of your head in space - your vestibular system - takes care of maintaining a stable image of the world even when your head bobs around as you walk. Otherwise, walking would be a blurry journey of craziness. Videos coming soon.
Simon Wang
Simon Wang 16 tuntia sitten
If there is no gravity, then I’m not overweight. I’m just accelerating faster than you bro. Take that Usain Bolt
Hemantha Ratnayake
Hemantha Ratnayake 17 tuntia sitten
Thank you very much.
Валентин Стойков
Валентин Стойков 17 tuntia sitten
From where the charged particle in the gravitational field will get the energy for emitting a photon?
Sean the Bawse
Sean the Bawse 17 tuntia sitten
Sooooo, what do we do about flat Earthers..?
Hyoryuji
Hyoryuji 18 tuntia sitten
just one little flaw in this video. You can't turn on the rocket thrusters in space, I mean you can but it would be pointless, you are in space already moving in a constant speed. And the thrusters would propel you in front, but there is nothing behind you so you can't propel yourself, or am I wrong here?
ramon ortiz
ramon ortiz 18 tuntia sitten
RESEARCH THE TRUE FLAT EARTH TOPIC NOW!!! NASA LIES AND LAUGHS ALL THE WAY TO THE BANK!! WE GIVE THEM $19 BILLION WHILE THEY GIVE US ARTIST RENDERINGS, CONCEPTIONS, COMPOSITES, CGI AND ANIMATIONS!!! Wake up already!!
ramon ortiz
ramon ortiz 18 tuntia sitten
If the independent mass of the earth weighing down on the fabric of space time is what produces a curvature of space time resulting in gravity then what OBJECTS OF GREAT MASS BECAME PRESENT AFTER THE ALLEGED BIG BANG TO BEND THE FABRIC OF SPACE TIME TO CREATE GRAVITY ITSELF THAT THEN PULLED IN DEBRIS TO ASSEMBLE THE EARTH, MOON AND STARS????? Then explain who this curvature of space time contradicts itself with retrograde!!? If gravity itself pulls all matter to its center how then are we taught that the universe is expanding??? Liars!!!
ramon ortiz
ramon ortiz 18 tuntia sitten
You are a blatant liar!! Gravity is not a force or occurrence!! It is a farce!! To date some 500+ years gravity itself has NEVER BEEN DIRECTLY DETECTED PER CURRENT, FIELD, WAVE, BEAM, RAY OR PARTICLE ON THE EARTH!!! You teach gravity as fact when in truth it isnt fact but on agreed upon THEORY!! We are only taught about what gravity does, results or makes happen. WE ARE NEVER TAUGHT ABOUT WHAT GRAVITY IS ITSELF BECAUSE GRAVITY ITSELF HAS NO INDEPENDENT PRESENCE OR SUBSTANCE TO DIRECTLY DETECT!!!
Visa
Visa 19 tuntia sitten
Gravity is like the centrifugal force: not technically a real force, but you can pretend that it is and still get accurate results
Rafael Domenikos
Rafael Domenikos 19 tuntia sitten
Awesome video! But I have a question for anyone willing to shed some light on this. One thing that was not mentioned in the view presented in the video was kinetic energy. How can one say that free falling should be the same thing as staying still in space. In one case the subject has kinetic energy, in the other it has not. I am not familiar with the physics of GR but as an engineer (and by this inherently bound to the Newtonian view 😅) I am sure that one object has kinetic energy and the other has not, thus I cannot understand how these two cases are to be seen as equals. I am 100% certain I am not smarter than Einstein obviously, so any help to pinpoint where is the error in my thinking?! Thanks for the help!
painmt651
painmt651 19 tuntia sitten
So then wth is a “gravitation wave”?? Or whatever the heck they’re calling it when they say they’ve measured gravity. If gravity is not a force how can there be a gravity wave?
SCOTT DC
SCOTT DC 19 tuntia sitten
Gravity is an actual force, it has nothing to do with the geometry of space or curved space. A new theory of gravity was just published in a new ebook, " The Universe 20/20" on amazon, everything you think you know about gravity is now obsolete.
Twelve Wing Productions
Twelve Wing Productions 20 tuntia sitten
Where this falls apart is in what has to happen to the rocket to maintain 1G apparent. To do this, the rocket must remain in acceleration. In a fairly short amount of time, the rocket would be at light speed. What then? So I think it's more appropriate to think of gravity more like buoyancy. An object is influencing the Higgs field to the exact proportion to the amount of space it displaces. The proof is a simple one. We don't continue to accelerate to maintain 1G. Therefore we must be exerting a "force" on the Higgs field to maintain our cosmic buoyancy.
Jimmy Moore
Jimmy Moore 20 tuntia sitten
Something always seemed a bit off about gravity to me but this explanation of it put things into focus that were a bit hazy prior to this particular explanation, thank you
BP_CherryBlossomTree
BP_CherryBlossomTree 20 tuntia sitten
I might tell this to my science teacher
RR PLAN C
RR PLAN C 21 tunti sitten
'THEORY' means it's not even proven. The End.
RR PLAN C
RR PLAN C 19 tuntia sitten
@Michael Cahoon It's about the Frequencies. Life as we know it would not exist without the frequencies that bind everything togther. The earth is not flat and it's not round either.. It's not really physical. The definition /word physical is Man Made MM 33. So you don't really know what it is and neither do I. I have a pretty good idea though. Prove all that wrong.
RR PLAN C
RR PLAN C 19 tuntia sitten
@Michael Cahoon So you are ignoring me now then it seems? That tells me a great deal.
Michael Cahoon
Michael Cahoon 19 tuntia sitten
@Aaron Jacobs Thanks...! Get back to me if you ever find out.
Aaron Jacobs
Aaron Jacobs 19 tuntia sitten
@Michael Cahoon well, the infinite density of the singularly is what causes the phenomenon (I don't know exactly as I haven't spent nearly long enough studying this so I'm not confident answering you)
Michael Cahoon
Michael Cahoon 20 tuntia sitten
@Aaron Jacobs So, the crushing density of the object that initiates the 'black hole' is in fact the instigator of the force that pulls on anything that comes near it's singularity. Is that correct?
scubahunter00
scubahunter00 21 tunti sitten
Does this infer that time is technically a force instead of gravity?
losmikes
losmikes 22 tuntia sitten
Wow, Phoebe was actually right, we are not being pulled, but pushed by Earth
Raiyan Talukder
Raiyan Talukder 22 tuntia sitten
Yeah screw you veritasium, you think you know better than me?
Shannon Butler
Shannon Butler 22 tuntia sitten
This video is great!! Would someone care to please explain why the gravity would be pushing up against my feet and against someone elses feet on the opposite side of the earth? Would the direction of the acceleration not be uneven/at an angle or is this due to the inertial mass countering it? Basically why is the angle of the force not noticeable?
Alex Rivera
Alex Rivera 23 tuntia sitten
That “illusion” hurts... a lot!
Trond Zaphirax
Trond Zaphirax Päivä sitten
What I get from this is that the sci-fi "anti-gravity" devices are impossible.
Matt Cooke
Matt Cooke 13 tuntia sitten
Not necessarily, if we can find a way to generate negative mass then we can accomplish a repulsive force much like positive mass being attractive.
Egxon Shabani - Composer
Egxon Shabani - Composer Päivä sitten
Wow... incredible..
noodle doodle
noodle doodle Päivä sitten
As long as I've known Derek he's consistently asked the difficult questions. This video challenged me, and taught me many things. I want to try the eclipse photo now. Impressed Eddington did it in 1919.
asdwaetd
asdwaetd Päivä sitten
right wing and conspiracy nutters: "gravity doesn't exist and this video is proof, got ya"
Willoughby Krenzteinburg
Willoughby Krenzteinburg Päivä sitten
right wing? If you really think that, then you're just projecting.
Max Fuentealba
Max Fuentealba Päivä sitten
Excellent explanation! but, What about tides?
Albert Einstein
Albert Einstein Päivä sitten
ha ha ha I know... I'm always right..... sad newton noises
Anwar Zeb
Anwar Zeb Päivä sitten
One of the best teachers
Anwar Zeb
Anwar Zeb Päivä sitten
Good teacher
Mihai Duma
Mihai Duma Päivä sitten
Step 1. Pause the video at 12:31 Step 2. Set the speed at 0,5 Step 3. Enjoy 🤣
Hyoryuji
Hyoryuji Päivä sitten
13:57 bending light would apply easily if the distance travel of the light increased?
Hyoryuji
Hyoryuji Päivä sitten
you just killed Newton Bro
REME
REME Päivä sitten
This is one of your best Derek. You’re an outstanding “explainer,” as is Diana. Well done. I watched your video a few times and suddenly ... “click”.... the lights went on.
Prithivi Raj
Prithivi Raj Päivä sitten
Yo
Quinn Haze
Quinn Haze Päivä sitten
Element 115 can bend space time
Osmone Everony
Osmone Everony Päivä sitten
So you say it's a deformation in spacetime which makes masses attract each other as gravity is no force. I wonder which force bends spacetime in the first place if it's not gravity. 😵🥴
dcoog anml
dcoog anml Päivä sitten
Literally this video is just blew up my mind. After watching this video, while imagining all those he explained... Wow😍😍 You just gave me a new perspective of seeing the worl
Ryan Byer
Ryan Byer Päivä sitten
Can you explain black holes next?
dcoog anml
dcoog anml Päivä sitten
This is so beautiful, I have looked at this for 5th time.
Holdin Muhl
Holdin Muhl Päivä sitten
So if there is no such thing like a gravitation field, how can there be gravitation waves? Waves do need a field, don't they? If gravity is no force, so how can it be compensated by a counterforce? Due to Newton force = counterforce. What is a force? If a force can accelerate a body then any force shall curve spacetime. So any force is an illusion? Strange video this!
Sahana Joshi
Sahana Joshi Päivä sitten
Charge: Gravity, it's working against me.
ilkov
ilkov Päivä sitten
Wow, all concept are explained very well and in a very entertaining way. However every time it says acceleration and gravity are completely equivalent, it seems to me it is missing something. I believe Einstein already pointed out that GR is valid only locally: two objects free falling in the elevator will get closer to each other, as the two people walking towards the north pole, this will not happen for the accelerating rocket. I might be wrong, but I think it makes some difference.
Abara Nihei
Abara Nihei Päivä sitten
But what exactly is pushing atoms into eachother to a point where the almost fuse like in a Neutron Star? I get the Curved Spacetime thing but, thats an honest Question, what makes matter crushing into itself? Just a bent geodesic?
Gabriel Tobing
Gabriel Tobing Päivä sitten
Tell it to my physics teacher.
L. W
L. W Päivä sitten
Einstein also said: If you can't explain it simply, you don't understand it.
krvnjrcbs
krvnjrcbs 2 minuuttia sitten
That’s not really true in my experience. It depends a lot on your audience. Have you ever tried explaining something conservative to a liberal or visa-versa?
Bearapalegic Bear
Bearapalegic Bear Päivä sitten
What an idiot. Space doesn't exist. Our atmosplane would b sucked off and fill the available space. 2nd law of thermodynamics. Wake up. If theres pressurized air we need a container. Stop it sheeple. Its flat water isn't magical sticky bendy NASA water. Its flat tge way i have seen it in every puddle
wajid abid
wajid abid Päivä sitten
one of the best video and made it to simplify it for a basic person to understand how gravity works. salute to you dude.. u have done something many teachers in the world failed to explain.
Dadson worldwide
Dadson worldwide Päivä sitten
Goid job . It really highlights how particle physics is really imaginary interpretations that things like gradations and qaurks are really non existent it just helps us have random calculating prediction of probability that works at this space time moment. We witness the dream of dreams but your supposed to ignore that and lie to yourself about it. Pick and choose the observations that you will accept and ignore those that don't tell you the answer you want to see .lol I luv science though its always going to be limits that allow us to talk ourselves into and out of reality interpretation
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