♥ The infinite blackness of space corresponds to an imaginary blank slate, which has the potential for something to exist within it. ♥ The 'things' that exist within that imagination are thoughts, given form. ♥ As individuals we get to experience these thoughts through the 5 senses of the vehicle that is our body. ♥ These senses are fed up into our brain, and converted into thought in our mind for us to perceive. ♥ If this greater mind that is exterior to us, but which also contains us, did not flow into us continuously, we would not exist. ♥ We are the universe, experiencing itself from many different perspectives. ♥ We are one with the Force, and the Force is with us. ♥ We are in the Father, and the Father is in us. ♥ Our minds are a part of God's mind. We are very holy! ♥ Therefore, LOVE your neighbor as yourself:)
@@bullpuppy7455 very interesting, energetic bubbles upon an ocean of energy, yet move as if by some spirited wind upon the waters. The wind of the laws of physics & yet His intervention, yet our wind upon the world & each other as well. We sense the world & each other not by touching it even, but merely by being in the proximal presence of one another & having our particles mediated to one another by forces via virtual particles & bosons. These invisible carriers & messengers communicate between all of our quanta infinitesimally & somewhere, somehow we sense it macroscopically. Where is a sense? & What is it? But yet another fluctuation of energy across our dendritic bodies, where is our soul but perhaps in the collective excitation of this brief collection of quanta?
As a physicist this is the answer to so many simple questions.... Almost like "It depends...". The problem is: The universe isn't "simple". So how should there be simple answers - especially to simple questions? "Is the Earth flat?" - "No, but yes, maybe, it depends - if you are moving with the speed of light, basically everything is flat, but if you don't, Earth behaves like it isn't, but maybe we are wrong about the behavior of things, so maybe it is, but .if you view it from the point of view of a four dimensional being, you can wrap the earth into flat shapes, but if you are a being of higher dimensions you most probably don't have any idea of what 'flat' is., but...".
They should take their jokes elsewhere. Some people would like to find further explanations or professional opinions in the comments, but all they can see are jokes upvoted by the crowds of average-Joes who flock on them like flies on pies of excrement.
But it doesn't make you understand what TIME is. Time is seen as a sort of space something can move, "flows" through. Philosophically uninformed videos :/
@@riccardocuciniello2044 Universe doesn't have to make sense to humans. Humans couldn't fathom germs, now we do. If you say you understand it fully, then you don't. Watch startalk. We have tools to help humans try and grasp what is happening. Like maths for blackhole gravity. We humans have a need to make something this or that. Yet light is a wave and a particle point. It's not a wave OR a particle. We don't have the right definitions at this time to describe many things that math can prove. That is all. Our time of understanding/definitions are going to update as we gain a sensibility of it all. Humans couldn't fathom germs, now we do.
@@MrHeroicDemon it absolutely MUST make sense to humans. Not now, not tomorrow, but it must have to possibly to make sense, even if we will never understand it - in other words, we must be able to understand the universe completely, even if we will never practice succeed in it.
@@MrHeroicDemon the fact that we can't understand what maths proves it's a problem, but what does it mean? It means that there is a real shift between reality and the object of science itself. Reality as we experience it normally is not just an illusion, but it's the realm in which we can't not live. We don't live in the realm where things are and aren't at the same time - at the same time, to make sense of our reality, we must construct something that isn't part of normal reality. One of those things is time. We don't, and won't ever experience time for what it is according to scientific theory. But scientific time isn't TEMPORAL at all. So, while "time" may be a physical notion, the character of temporality is the foundamental way of human experience of reality.
6:18. To be honest, this is the first time I truly understood what spacetime means and what gravity actually is (according to modern physics and Einstein... it may change). I feel like an idiot, but I have to say something. Thanks for another awesome video
@@hellothing no because fish don't fly, they swim. They see swimming fish, just as we see flying birds. You can't fly in the water. You can swim, float, sink, et cetera...
@@UncleFLarry This is how gravity work 1 - think of space as a fluid The mass of the earth dispersed space.... Space compresses on earth... That's how gravity works, it is a push
oof ouch no one recognizes you....I don't know you but I checked out 2 of your latest videos just now to see wh at k i n d o f y o u t u b e r y o u a r e
As far as I know, Einstein was a fierce defender of Mach‘s principle. He did not believe that spacetime was a thing. Also acceleration must be relative to SOME reference frame. The bucket water would NOT bend in an empty universe. Considering the Lense-Thirring effect, there even seems to be empirical evidence for this apparently merely philosophical stance.
@FocusFanatic I don't know if you were kidding when you used the word black. I did not get the joke. Africa is a very large continent with many countries. American blood is rich in it's DNA. in it's way, it leads us on in our evolution. It is strongly believed that the Human race began around the great lakes of Africa so please open your mind to ALL the wonderful and beautiful people around you, please. People that have difficulty understanding things are still probably smarter than you
Hey guys, Michael, Vsauce here. As we all know, the word space derives from the Latin word 'spaceibus' which, back then meant big. They would often use it to describe house size. Anyway, space. What is it? Space is where there is nothing. Like a vacuum. Vacuum is a cool word because it is the only word to have a double U but not a W. As I was saying, space is a vacuum (nothing), a place where there are no atoms. For example, if I was to hold out this empty bottle *shows bottle* it may look empty, but there is actually matter in it. Atoms, particles if you will. Oxygen with a combination of other gases and even water. In conclusion, the answer is... No.
Even if space was a pure vacuum, it still has a property of separating matter by distance, so it IS a thing that keeps all of the matter from clumping together.
space isn't really a thing, just a part of a thing. space is 3 dimensions but we are 4 dimensional and the fourth dimension is time. my theory is that the expansion of the universe (which is constantly accelerating) is time and it explains why time only goes in one direction because the universe is only expanding not contracting. Matter warps space time and this warping effect causes gravity however the warping effect also causes time dilation due to time being a quantity of space time. this also explains why the speed of light is constant as photons are massless and therefore do not warp space-time and can travel at the maximum speed allowed by space ( shown by that nifty graph at the end other the video). I probably just came to the same conclusions as many other people but this video really cleared it up for me. Thanks itsoktobesmart !
At 6:02 it's just like people who are tired of working saying that the time is so slow and people who don't mind about anything saying that the time is so fast.
Ahhh I see what you did there with that abbreviation of 'have.' E=hv, the Planck-Einstein equation, which states that photon energy is proportional to frequency. I feel special because I'm on youtube and I know basic physics. Also I have the physics GRE in less than a week, pls send help.
the problem with the analogy of the bucket is, that at each point during the spin, you're actually on a linear trajectory moving outward relative to the bucket.
Can anyone please clarify this? I've heard that the universe started out from a point infinitely small; hot & dense. My question is, if the starting point of the universe was just a hot & dense state...then what was available to compare its temperature & density too? Hot compared to what? Was there a temperature outside of this hot dense state? Dense compared to what? Was this hot & dense state contained inside of something else with less density? How can something be described as hot & dense, when there is not yet anything else to compare its temperature & density to?? -Thank You in advance for your clarification.
You need to check temperature definition: Cold and hot are relative to atoms movment. The coldest: atoms with no movment.(or minnimun possible) The hottest: atoms moving at the maximun velocity possible.
roner61 Thank You for your reply. & yes you are correct. But let's remember that at the moment just before The Big Bang event happened, there were no atoms yet. The 1st atoms of Protium, which is just comprised of 3 quarks that make a proton, didn't form until after the singularity state. So my questions remain, hot compared to what? Dense compared to what?
*"what was available to compare its temperature & density too?"* < Nothing, but then again, no one was around to make comparisons then. We're comparing it to the present moment.
Production on this episode is GREAT... but as an Englishman and a Pedant... I've got to pick out the high point as "James Cleerk, no Claark Maxwel!". :) That's probably the clearest and simplest description of spacetime EVER as well.
Greek Zeno from Elea put it right by asking 2,400 years ago "if the place (space) is something, what is it in?" and then answering "in another place, and that in turn in another, and so on, so there is no place (space)". Therefore there is also no time because time is motion and motion without space does not exist.
that Einstein gag made me remember the other physicists better. After the video, I remembered the name Ernst Mach. That's amazing because I don't ever remember anything from my UA-cam binges
Alright welcome back to the show. I'm Philip Jacobs.. And let me tell yea heh I care about my personal wo-woah Hey! Who's around me right now? Who's around me?! Now why don't we step up here and everybody get stepped up, and lets get some stepped up Personal Space up in this place!
the problem with using the spinning bucket of water is that when an item is in motion it is always attempting to move in a straight line. curved movements only happen when something else interferes, like the walls of the bucket blocking the water's intended path or gravity as things travel past.
But won't the water be spinning relative to the bucket, or vice versa? Not to say I don't think space is a thing, on the contrary, I just think that proof isn't the best one.
And can there be spacetime without matter? If there is no bucked spinning, nor anything else, is spacetime still there? If not, does that mean spacetime is an aspect of matter?
Idk the correct answer to this question, but in ny opinion, this is still considered a very good question! After all, I was taught that no matter, person, place, thing, or any event cannot exist without spacetime. There would have to be the 3 spatial coordinates of x, y, & z for there to be a place for any existance, plus the w coordinate to represent time and tell us when it existed. So without spacetime, there definitely isn't a time nor a place for any matter.. But what if that concept is also, somehow, actually reciprocated?.. as to imply an inverted causality that would nullify any existance of a spacetime without any kind of matter or substance to validate any space or time (the duality of reality shows its face almost anywhere you look) #thingsthatmakeyagohmmmmm
Finally, a video that puts it simple. What 6:25 basically says is that everything in our universe is constantly moving and it is moving at the speed of light. Yet it is not moving through space but through spacetime. So if it is perfectly motionless in space, it travels through time with the speed of light and if it travels through space with the speed of light, time won't pass for it at all (which is true for photons). This explains why time slows down the faster something moves through space: It's a 4D vector whose length (= speed of traveling) cannot change, only the direction it is pointing to can change and three of the possibly directions are space and one of them is time. And this explains where gravity comes from, which isn't a force: Gravity bends spacetime and as a result the movement vector points to a different direction, as the vector is always straight but the coordinate space isn't anymore, it's bent. The result is, that the object makes a movement in space that it shouldn't actually do because it's not following the bend.
Okay, going beyond the scope of this video: IIRC, I think it was also Einstein also said Spacetime was curved. And that each object curved the space around it in a way similar to dropping differently-weighted balls on a trampoline. (Correct me if I'm wrong.) I think I heard it from Dr. Michio Kaku that this curvature of Spacetime *pushes* objects near them rather than the object pulling on the object with gravity. Remember the "Vortex" wells where you could put a coin art the top rim of an inverted cone , push it to one side, and watch it spiral down? Remember you pushed to the side at the beginning, giving it an initial velocity at a right angle to the center of the cone. But the cone forced it to change directions. And the closer to the center the coin got, the faster the velocity of the coin. In Physics notations and illustrations, they show this by drawing a vector from the point to a right angle to its line connecting the point to the center. They also show the gravitational attraction of the planet from the point toward the center. Both vectors are drawn correctly for calculating exactly what magnitude and direction the object will take, but this shorthand is confusing. If you draw arrows not as vectors but as directions the forces originated, then in the money well your force pushing on the coin is from your finger which is placed behind the coin to push it forward, and the force from the well is directed inward toward the center from the wall of the cone to the coin. So is gravity an attractive force? Or is it, as Dr. Kaku says, a push on the object? Discussion is welcome. And this video also begs the question, if there were nothing in the universe except you (in a protective space suit) would there be any acceleration anyway? Rotational acceleration could be created, and that is movement relative to your center of gravity. You might not see the effect of this rotation, but you could feel it physiologically as your blood would be forced to your head and to your feet. And There might be other physiological effects as well.
At 2:30 , if you look with respect to 'bucket' there is a pseudo-force (centrifugal) which acts as it is a non - inertial frame . So, it explains the force 🤔 Please correct if I am wrong😃 By the way loved the 'Entries' of Einstein
I have a Question: At 6:08 you said "An objekt not moving thou space" Not moving relativ to what? The earth, the Galaxy? How can I know that I am not moving?
To answer your questions we need to understand the differences between space-like and time-like motion. The four ships in this video's example display these alone and together: Diagonal Ship: Both space-like and time-like motion, this ship is not accelerating. The velocity of the space-like motion is X m/s, something we understand easily using basic physics. The time-like motion has a speed that is curiously measured in seconds per meter, in this case it would be traveling through time at a rate of... 1/X s/m. Yes, you travel a number of seconds through time per meter of space traversed. Remember Einstein's clocks measure time by measuring a photon in motion through space, space is measured in meters; seconds per meter is literally the unit of time-like motion. Perpendicular Ship: Only time-like motion, this ship has zero velocity and is not accelerating (not possible for reasons, but I'll continue). The time-like motion has a speed of ∞/0 s/m because you would travel infinite seconds for each 0 meters traveled... therefore ships truly at rest have an undefined speed in time-like motion. Parallel Ship: Only space-like motion, this ship has velocity of exactly C and in not accelerating (and has no mass, somehow). The time-like motion of this third ship is 0/∞ s/m because you would travel zero seconds for each infinite meters traveled... therefore ships traveling at C also have an undefined speed in time-like motion, but it is a different undefined. Curved Ship: Both types of motion, and is accelerating. Nothing different than the first ship to be honest. Einstein used a distance metric that included time called the Spacetime Interval, this metric measured the distance between two points, like the endpoints of a ship's path, in such a way that all observers would agree on the interval regardless of their frame of reference while observing some event like a ship path. Spacetime intervals that do not have one component of the interval, the space or time component, are special cases that only work in particular cases. I could go on about it, but I have said enough for now.
+Felix Vogel You can know that you're moving because it's impossible to stay still in spacetime. In fact, everything is moving through spacetime at the same velocity (the velocity of light). Now how much of this velocity gets transferred to the space or time directions depends on the reference and hence is relative. However, the actual "speed" of everything is always the same. You should take a course in special relativity. It's really interesting. And fascinating as well.
This is not correct. Not everything is moving through spacetime at the same velocity. Remember, velocity is a measurement of speed and direction... surely not everything in spacetime is moving in the same direction. The absolute value of velocity, on the other hand, is the same for the types of matter and energy we have discovered. I don't want to rule out the possibility of discovering matter or energy that does not obey these rules however (I think of Tachyons from Star Trek). In fact, some hypotheses imply that exotic matter like anti-hydrogen is in fact normal hydrogen moving backwards in time... This means that particle anti-particle annihilation is just two normal hydrogen smashing into each other in the time dimension! One from the future and one from the past! The reason the charges are switched is because we are seeing the anti-particle moving in reverse through time, and thus the EM waves produced by the anti-matter is flipped. QED predicted anti-matter's existence because of these ideas, and we have indeed synthesized anti-hydrogen.
Somali Pirate Who Pirated Your Girlfriend life is not a thing. it is a process happening to a thing made up of many other things, and using other things.
Somali Pirate Who Pirated Your Girlfriend First of all, how dare you pirate my girlfriend that doesn't even exist yet... Second, Life is what meaning we give to it. Life has no meaning and thus no significance in the cosmic index. Life started on Earth some 2 billion years ago, till now our impact on our own Galaxy is beyond insignificant
Wonton Einstein’s was wrong. The 1887 MMX recorded the Aether ....but the the speed was not near the .40 fringe shift needed to justify the heliocentric preference. The laboratory experiments all prove the geocentric model which Einstein detested (ie...God, creator, judgement ...etc) Einstein invented his 1905 STR to effectively null those laboratory results in order to keep the BS heliocentric model. Genesis 1:1😊👍🏻
I'm at 4:00 now and I'm annoyed that no one is like "You are being pushed outward in that spinning motion because you are constantly changing direction - that is why you feel it"
JLC You're right. Kant stated a philosphical thing. Physicists don't sit back, think about those things, write down their thoughts and call it a theory. a physics theory needs to be proven with math. talking about these theories, like it is done in this video, is just explaining what the math means for real life
Amazing video , now i do have a question , Objects at rest are moving at top speed through time ? What does that mean ? And what is that speed ? If anyone can enlighten me please do :)
Dear Joe, so much to explore and share on this engaging theme, but not on the comments' section, unfortunately shared with many who don't address it rationally and respectfully.
Hey Q/A time: If mass is constantly changed to energy and energy to mass (the reason why we weigh even though ~99% of our body is just blank space*) and if the "void" space out there has energy (CMB or quantum energy fluctuations - whatever you like), Do the Void space between us have mass? And if it does have mass, Doesn't that make void space have its own Gravitational field (Yeah that inward dimple on spacetime )? * Veritasium had a video explaining this some time ago (yrs ago)
I think you got that a bit wrong. Mass is not changing to energy and back again. Mass IS energy; it's energy that is trapped from traveling at the speed of light. Thus it is energy that experiences time (since, as described in this video, if something does not move at the speed of light then it travels through time instead)
Chaitanya Singh It does not have mass since its made up of "virtual particles" whitout mass. If they however had mass that would break the thermodynamic law about conservation of energy. The virtual particles have to exist in the first place to satisfy Heisenbergs uncertanty principle about energy and time. The more you know about the energy of a particle (or in this case, vacuum) the less you can know about the time it had that energy and vice verca. Because a classical vacuum would have no energy in it there would be an infinite uncertanty about the time the system had that energy, which is simply not plausible, therefore viritual particles were theorized and later proved to be right by the casmir effect. If i remember correctly the energy required to make those viritual particles are borrowed from space itself, creating negative matter (not to me confused with dark matter or anti matter) for a very short amount of time. Sorry for my bad english
The General Theory of Relativity is not inconsistent with Mach's principle. Mach's Principle actually is inspiration for it and might be behind it via how gravity is estructured at a quantum level.
If you're spinning in a bucket in the "empty universe" thought experiment, you're spinning relative to other points on the bucket. That's the whole idea behind angular momentum. Suppose it was a massless bucket, you're still moving relative to you're previous position, or relative to the information of where you were (Velocity and acceleration can be measured based on your initial time and place based on the movement of the object, you just have to have a method of quantifying the initial condition and measuring the change ). The "empty universe" becomes the entire reference frame, so a relative velocity to anything else is irrelevant. My hypothesis is that the other matter in the universe is irrelevant beyond the cosmic horizon.
...the 'key' to understanding the Universe, is to 'assert' TIME as the FIRST DIMENSION, zero of 1,2,3... where 'O' indicates 'containment'... NOW 'How long is a second' ...(imho) time 'dilates' to allow 'access' and 'contracts' to 'contain' perception ...'alignment' of 'meter' (music) allows a dynamic conversion in 'realtime' (how long is a moment) ...NOW, imagine 'absolute time' and the 'abstraction' of the 'temporal shell' as it floats in the Universe
As usual, awesome video! Pretty interesting how Newton's concept was on the right track he just didn't have all the accumulated knowledge Einstein had access to maybe?
Wow. This is the first time I actually understood a _tiny_ bit about light speed and relativity. That spacetime graphic is _really_ helpful! Thank you!
this video reminded me of a fun question that came to mind when watching "Never Ending Story" about how they treat "The Nothing" as a thing, "You mean like a hole?" "No! a hole would be something... There was just... nothing" If the absence of something is nothing, then what is in the absence of nothing?
Actually, when spinning with a bucket, you ARE moving relative to the bucket. As the bucket spins around, YOU are pulled by it, not simply spinning with it. You are a separate object which the bucket is acting upon. As such, it spins and gives a tug on you. Then, you in turn have a tendency to continue moving in the direction that you are tugged, but the bucket pulls you away from that direction. That's why you experience force on your body even if there are no other things besides you and the bucket. I really don't see how spacetime comes into this. I still don't see space or time as things, and in the event that neither of them are actually a thing, spacetime itself cannot be a thing. Zero plus zero does not equal one. If we assume a universe where the bucket and the person are simply spinning on their own without one acting on the other, there would be no centrifugal force.
Space? That's just, like, your perspective…
Tell us what you thought of this week's video!
It's Okay To Be Smart Its good? ( i havent watched it yet 😂) ok ill leave
It's Okay To Be Smart
It's nearly midnight I'm sleepy it's Wednesday tomorrow and I have no clue.
20/6/17
Bathwater ( ͡° ͜ʖ ͡°)
It's Okay To Be Smart plz sub to savage ice cream and maby a shout out i loved it.
I think it was one of your most exciting video yet.
I have never seen a 3D graph of space-time like that before. I like it.
Kai Widman Yea, its a really good way to represent it.
It makes something so confusing so simple
me too finally understand it correctly very clever picture!
why does an accelerating object have a curved trajectory in that graph though?
Jack Müller because as it speeds up it will travel faster through space but slower through time
Joe: and now its empty
Michael: Or *is* it?
*Vsause music starts playing*
Who's Joe?
Joe mama
That Albert Einstein graphic is life
what is life though?
Bum bummmm. Doooo doooooo......
what's the song playing during the gif.
YES! I want to see more of that.
It's Okay To Be Smart, play that Albert Einstein graphic!!!
someone GOT TO MAKE that color changing Einstein graphic into animated GIF.. please!
Colour
@@hvxry color
@@cespen9999 colour
This is the stupidest racistism evar.
@@Teelirious to be honest, i am surprised they are arguing about Color vs Colour instead of GIF vs GIF...
God damn, that was fantastic.
Ok
How the heck are you not verified? Also love your vids
Ayye the Existential Turtle!
Love your vids, you have a gift with writing.
♥ The infinite blackness of space corresponds to an imaginary blank slate, which has the potential for something to exist within it.
♥ The 'things' that exist within that imagination are thoughts, given form.
♥ As individuals we get to experience these thoughts through the 5 senses of the vehicle that is our body.
♥ These senses are fed up into our brain, and converted into thought in our mind for us to perceive.
♥ If this greater mind that is exterior to us, but which also contains us, did not flow into us continuously, we would not exist.
♥ We are the universe, experiencing itself from many different perspectives.
♥ We are one with the Force, and the Force is with us.
♥ We are in the Father, and the Father is in us.
♥ Our minds are a part of God's mind. We are very holy!
♥ Therefore, LOVE your neighbor as yourself:)
@@bullpuppy7455 very interesting, energetic bubbles upon an ocean of energy, yet move as if by some spirited wind upon the waters.
The wind of the laws of physics & yet His intervention, yet our wind upon the world & each other as well.
We sense the world & each other not by touching it even, but merely by being in the proximal presence of one another & having our particles mediated to one another by forces via virtual particles & bosons.
These invisible carriers & messengers communicate between all of our quanta infinitesimally & somewhere, somehow we sense it macroscopically.
Where is a sense? & What is it? But yet another fluctuation of energy across our dendritic bodies, where is our soul but perhaps in the collective excitation of this brief collection of quanta?
"Is space a thing?"
*Well yes but actually no*
But yes
But no
As a physicist this is the answer to so many simple questions.... Almost like "It depends...". The problem is: The universe isn't "simple". So how should there be simple answers - especially to simple questions? "Is the Earth flat?" - "No, but yes, maybe, it depends - if you are moving with the speed of light, basically everything is flat, but if you don't, Earth behaves like it isn't, but maybe we are wrong about the behavior of things, so maybe it is, but .if you view it from the point of view of a four dimensional being, you can wrap the earth into flat shapes, but if you are a being of higher dimensions you most probably don't have any idea of what 'flat' is., but...".
@@delqyrus2619 calm down they were just doing a joke
They should take their jokes elsewhere. Some people would like to find further explanations or professional opinions in the comments, but all they can see are jokes upvoted by the crowds of average-Joes who flock on them like flies on pies of excrement.
But... What is a "thing"?
**music from Vsauce**
The Artist Anything that can be experienced.
Unknown Name What does it mean to experience something?
The Artist If you can see it, taste it, smell it, hear it, touch it or do one of the above with a projection of it, you can experience it.
Unknown Name What if there was no being able to experience reality?
*cue vsauce music*
That Einstein guitar solo tho 🤘🏽
I would like 10 hours of that Einstein solo with the color changing animation and all.
Me too
that graph showing relation between space and time was helpful to understand spacetime, great work as usual
yh.. very ncie
But it doesn't make you understand what TIME is. Time is seen as a sort of space something can move, "flows" through.
Philosophically uninformed videos :/
@@riccardocuciniello2044 Universe doesn't have to make sense to humans. Humans couldn't fathom germs, now we do.
If you say you understand it fully, then you don't. Watch startalk.
We have tools to help humans try and grasp what is happening. Like maths for blackhole gravity. We humans have a need to make something this or that. Yet light is a wave and a particle point. It's not a wave OR a particle. We don't have the right definitions at this time to describe many things that math can prove. That is all. Our time of understanding/definitions are going to update as we gain a sensibility of it all. Humans couldn't fathom germs, now we do.
@@MrHeroicDemon it absolutely MUST make sense to humans. Not now, not tomorrow, but it must have to possibly to make sense, even if we will never understand it - in other words, we must be able to understand the universe completely, even if we will never practice succeed in it.
@@MrHeroicDemon the fact that we can't understand what maths proves it's a problem, but what does it mean? It means that there is a real shift between reality and the object of science itself. Reality as we experience it normally is not just an illusion, but it's the realm in which we can't not live. We don't live in the realm where things are and aren't at the same time - at the same time, to make sense of our reality, we must construct something that isn't part of normal reality. One of those things is time. We don't, and won't ever experience time for what it is according to scientific theory. But scientific time isn't TEMPORAL at all. So, while "time" may be a physical notion, the character of temporality is the foundamental way of human experience of reality.
I appreciate how this channel factors in the relatively short attention soan of people and constantly bombards us with changing images and graphics
1:03 "It all has to do with relativity"
*ROCK METAL MUSIC!* *RAINBOWS* *ALBERT EINSTEIN!* *SCIENCE!* *PHYSICS*
*BOOM!!!*
*BOOM!!!!*
*!!!!BOOM!!!!*
What's the Einstein "theme"? It sounds totally wicked, bro
Tuchulu darude sandstorm
arigato, Notch-san!
I found it here --> soundcloud.com/chrisgoulstone/red-star
Master Roshi Thanks for the link drop.
thenecromorpher no problem, happy to help
6:18. To be honest, this is the first time I truly understood what spacetime means and what gravity actually is (according to modern physics and Einstein... it may change). I feel like an idiot, but I have to say something. Thanks for another awesome video
Here's a playlist I made that explains it in more detail: ua-cam.com/play/PLogZUlUedQpb8oRmVvsF47YA8VUvpv9z0.html
But the real question is..
If crabs walk on the ocean floor, when they look up, do they see *flying* fish?
Codie Tanguma yes they do technically
@@hellothing no because fish don't fly, they swim.
They see swimming fish, just as we see flying birds. You can't fly in the water. You can swim, float, sink, et cetera...
@@UncleFLarry air is a fluid and is explained as such by fluid mechanics so yes, fish do fly, just in a much denser medium
@@paolovallejo8022 bingo. I tell people all the time that air is more like water then what you think of as empty space
@@UncleFLarry This is how gravity work
1 - think of space as a fluid
The mass of the earth dispersed space....
Space compresses on earth...
That's how gravity works, it is a push
It's mee
cool a verified youtuber
Lmao
oof ouch no one recognizes you....I don't know you but I checked out 2 of your latest videos just now to see wh at k i n d o f y o u t u b e r y o u a r e
can we please have that Einstein gif?
no you can't
🕸🕷dada
Well
Albert Einstein was kind of a rockstar. I mean he was a celebrity scientist and he even had groupies lol.
A L B E R T E I N S T E I N
LordHylar *Badass rock music start playing*
Ta da da da ta da da ta da daaaaaaaa
As far as I know, Einstein was a fierce defender of Mach‘s principle. He did not believe that spacetime was a thing. Also acceleration must be relative to SOME reference frame. The bucket water would NOT bend in an empty universe. Considering the Lense-Thirring effect, there even seems to be empirical evidence for this apparently merely philosophical stance.
I was following along until he started talking about spacetime
SAME
Im having a hard time understanding this.
You're not alone, rest assured. :D
Us
Tough stuff but super well done. Come back to it again after doing some more looking and this will seem easier.
@FocusFanatic I don't know if you were kidding when you used the word black. I did not get the joke. Africa is a very large continent with many countries. American blood is rich in it's DNA. in it's way, it leads us on in our evolution. It is strongly believed that the Human race began around the great lakes of Africa so please open your mind to ALL the wonderful and beautiful people around you, please. People that have difficulty understanding things are still probably smarter than you
FocusFanatic wat
The real question is:
Is thing a space???
MangoTube *vsauce music ensues*
Hey guys, Michael, Vsauce here. As we all know, the word space derives from the Latin word 'spaceibus' which, back then meant big. They would often use it to describe house size. Anyway, space. What is it? Space is where there is nothing. Like a vacuum. Vacuum is a cool word because it is the only word to have a double U but not a W. As I was saying, space is a vacuum (nothing), a place where there are no atoms. For example, if I was to hold out this empty bottle *shows bottle* it may look empty, but there is actually matter in it. Atoms, particles if you will. Oxygen with a combination of other gases and even water. In conclusion, the answer is... No.
Even if space was a pure vacuum, it still has a property of separating matter by distance, so it IS a thing that keeps all of the matter from clumping together.
hehe
Duuuuuuuuuuuuude.......
I was saying
"YOU CAN STILL FEEL IT SPINNING EVEN IF THERE'S NOTHING"
through the entire video
I demand a full version of that Einstein sick tune
6:53
DOCTOR WHOOOOOOOOOOOOOOO
this actually helped me finally understand spacetime .a concept I just couldn't get my head around but it makes so much sense. I'm saving this video💯
space isn't really a thing, just a part of a thing. space is 3 dimensions but we are 4 dimensional and the fourth dimension is time.
my theory is that the expansion of the universe (which is constantly accelerating) is time and it explains why time only goes in one direction because the universe is only expanding not contracting. Matter warps space time and this warping effect causes gravity however the warping effect also causes time dilation due to time being a quantity of space time. this also explains why the speed of light is constant as photons are massless and therefore do not warp space-time and can travel at the maximum speed allowed by space ( shown by that nifty graph at the end other the video). I probably just came to the same conclusions as many other people but this video really cleared it up for me. Thanks itsoktobesmart !
At 6:02 it's just like people who are tired of working saying that the time is so slow and people who don't mind about anything saying that the time is so fast.
Can we hv a loop of that Albert Einstein?
Nope maybe we can have a Spacetime of that Albert-o-Einst-ein *sigh* Yeah
Chaitanya Singh fu
Symphonic power metal makes absolute sense for introducing Dr. Einstein.
ua-cam.com/video/BM2-FY2QEog/v-deo.html
Don't bother with the souncloud link lykury gave you it probably doesn't work in your country.
Ahhh I see what you did there with that abbreviation of 'have.' E=hv, the Planck-Einstein equation, which states that photon energy is proportional to frequency. I feel special because I'm on youtube and I know basic physics. Also I have the physics GRE in less than a week, pls send help.
Why did that apple look so huge?
Can you change your gamer tag so it shows your balls
Jack Ahah lmao 😂
Maybe bc it's a huge apple?
It's a huge apple. You can find them commonly in US groceries. You can also find apples that are about half that size, called "lunchbox" size.
HOly crap this is enlightening. the part at 6:21 blew me away. I never thought about spacetime like that before, Thanks Joe!
the problem with the analogy of the bucket is, that at each point during the spin, you're actually on a linear trajectory moving outward relative to the bucket.
No! I wanted to see Einstein's awesome entrance!!!
(watches until the end)
*NEVERMIND!!!*
sion8 I wanted that too. So funny
Those small jabs and the fun they poked at with the Albert Einstein graphic gave me life. It made the video so much more fun and enjoyable
Can anyone please clarify this?
I've heard that the universe started out from a point infinitely small; hot & dense.
My question is, if the starting point of the universe was just a hot & dense state...then what was available to compare its temperature & density too?
Hot compared to what?
Was there a temperature outside of this hot dense state?
Dense compared to what?
Was this hot & dense state contained inside of something else with less density?
How can something be described as hot & dense, when there is not yet anything else to compare its temperature & density to??
-Thank You in advance for your clarification.
You need to check temperature definition:
Cold and hot are relative to atoms movment.
The coldest: atoms with no movment.(or minnimun possible)
The hottest: atoms moving at the maximun velocity possible.
roner61 Thank You for your reply. & yes you are correct.
But let's remember that at the moment just before The Big Bang event happened, there were no atoms yet. The 1st atoms of Protium, which is just comprised of 3 quarks that make a proton, didn't form until after the singularity state.
So my questions remain, hot compared to what?
Dense compared to what?
I suggest you look into hawkings theorys of the universe
*"what was available to compare its temperature & density too?"* < Nothing, but then again, no one was around to make comparisons then. We're comparing it to the present moment.
Hot and dense compared to the current state of the universe. It's the same universe, after all, just cooler and spread out.
If we could *FEEL* the bucket moving,
What makes us FEEL that?
The bucket. Remove that, you feel nothing because space is a mental construct. It can only be "sensed" in the mind.
Absolue space is definitelly god's bathwater
lol
True, and this is what real vacuum looks like : imgur.com/vRYhKUa
Space is filled with quack particles.
So then the big bang was a fart and the turd that followed was the precursor to life..
The more you know!
Nullo space is Vishnu's bathwater
@@timmy18135 Any even slightly knowledgeable Hindu would tell you that Vishnu is one personality of an unknowable supreme god anyway.
Production on this episode is GREAT... but as an Englishman and a Pedant... I've got to pick out the high point as "James Cleerk, no Claark Maxwel!". :)
That's probably the clearest and simplest description of spacetime EVER as well.
"no, too late! you mossed ur chance,"
me in the background: the music is cool tho
That graph was so amazing
Do "Is Time a Thing?" next!
he said, spacetime is a thing. Not time or space individually
@@akashwalavalkar7313 "Spacetime is a mathematical construct." -- Albert Einstein
Albert's "Soundtrack" is awesome :D I bet there's a power metal fan at the PBS staff haha
Why did you have to give us blue balls with the Albert Einstein thing? I was looking forward to that introduction.
Greek Zeno from Elea put it right by asking 2,400 years ago "if the place (space) is something, what is it in?" and then answering "in another place, and that in turn in another, and so on, so there is no place (space)". Therefore there is also no time because time is motion and motion without space does not exist.
I understood absolutely nothing
...
Mate don't worry neither do scientists, these are just theories after all :)
Giulio Baia The fact that scientists call it a theory, means that there is a lot of evidence behind it.
s nothing is a thing .. thanks ,, I will remember that
Because it was vague to begin with.
that Einstein gag made me remember the other physicists better. After the video, I remembered the name Ernst Mach. That's amazing because I don't ever remember anything from my UA-cam binges
depends on what space you are talking about. The out side of earth space or the personal space that most people dont have a concept of :p
Tell Me This can you explain what is this personal space?
xdas11 Can you explain me what explain is?
Or the Safe space that left are being crazy about.
Alright welcome back to the show. I'm Philip Jacobs.. And let me tell yea heh I care about my personal wo-woah Hey! Who's around me right now? Who's around me?! Now why don't we step up here and everybody get stepped up, and lets get some stepped up Personal Space up in this place!
I really appreciate your sense of humour combined with your sense of Education.
7:46
"The power house of the cell."
The Space-Time explanation and diagrams following 06:00 helped me the most
Great vid!
the problem with using the spinning bucket of water is that when an item is in motion it is always attempting to move in a straight line. curved movements only happen when something else interferes, like the walls of the bucket blocking the water's intended path or gravity as things travel past.
But won't the water be spinning relative to the bucket, or vice versa?
Not to say I don't think space is a thing, on the contrary, I just think that proof isn't the best one.
2:30
Joe: what are you spinning relative to?
Me: the camera!
And can there be spacetime without matter?
If there is no bucked spinning, nor anything else, is spacetime still there? If not, does that mean spacetime is an aspect of matter?
You got it backwards. Matter is an aspect of spacetime. Particles are perturbations of spacetime fields.
Idk the correct answer to this question, but in ny opinion, this is still considered a very good question! After all, I was taught that no matter, person, place, thing, or any event cannot exist without spacetime. There would have to be the 3 spatial coordinates of x, y, & z for there to be a place for any existance, plus the w coordinate to represent time and tell us when it existed. So without spacetime, there definitely isn't a time nor a place for any matter..
But what if that concept is also, somehow, actually reciprocated?.. as to imply an inverted causality that would nullify any existance of a spacetime without any kind of matter or substance to validate any space or time (the duality of reality shows its face almost anywhere you look) #thingsthatmakeyagohmmmmm
That graphic chart blew my mind. The concept was just a bit too abstract before.
What about dark matter?
In 20 years or so someone will come back and answer your comment
Dark matter is a thing that we don't know but is a thing
The Centalist if u use the reality stone from marvel to convert matter to antimatter
It doesn't matter.
Fred King
Scientists do know quite a bit about it.
Finally, a video that puts it simple. What 6:25 basically says is that everything in our universe is constantly moving and it is moving at the speed of light. Yet it is not moving through space but through spacetime. So if it is perfectly motionless in space, it travels through time with the speed of light and if it travels through space with the speed of light, time won't pass for it at all (which is true for photons). This explains why time slows down the faster something moves through space: It's a 4D vector whose length (= speed of traveling) cannot change, only the direction it is pointing to can change and three of the possibly directions are space and one of them is time. And this explains where gravity comes from, which isn't a force: Gravity bends spacetime and as a result the movement vector points to a different direction, as the vector is always straight but the coordinate space isn't anymore, it's bent. The result is, that the object makes a movement in space that it shouldn't actually do because it's not following the bend.
Name of the song used when Albert Einstein appeared?
i think it's "red star" by chris goulstone
Last Shadow Darude-sandstorm
Sorry had to
Thank you!
Last Shadow rick Ashley never gonna give you up
"Did somebody say red star?"
"Liberty Prime is online."
"All systems nominal."
"Weapons: hot."
Okay, going beyond the scope of this video:
IIRC, I think it was also Einstein also said Spacetime was curved. And that each object curved the space around it in a way similar to dropping differently-weighted balls on a trampoline. (Correct me if I'm wrong.)
I think I heard it from Dr. Michio Kaku that this curvature of Spacetime *pushes* objects near them rather than the object pulling on the object with gravity.
Remember the "Vortex" wells where you could put a coin art the top rim of an inverted cone , push it to one side, and watch it spiral down?
Remember you pushed to the side at the beginning, giving it an initial velocity at a right angle to the center of the cone.
But the cone forced it to change directions. And the closer to the center the coin got, the faster the velocity of the coin.
In Physics notations and illustrations, they show this by drawing a vector from the point to a right angle to its line connecting the point to the center. They also show the gravitational attraction of the planet from the point toward the center.
Both vectors are drawn correctly for calculating exactly what magnitude and direction the object will take, but this shorthand is confusing.
If you draw arrows not as vectors but as directions the forces originated, then in the money well your force pushing on the coin is from your finger which is placed behind the coin to push it forward, and the force from the well is directed inward toward the center from the wall of the cone to the coin.
So is gravity an attractive force? Or is it, as Dr. Kaku says, a push on the object?
Discussion is welcome.
And this video also begs the question, if there were nothing in the universe except you (in a protective space suit) would there be any acceleration anyway?
Rotational acceleration could be created, and that is movement relative to your center of gravity. You might not see the effect of this rotation, but you could feel it physiologically as your blood would be forced to your head and to your feet. And There might be other physiological effects as well.
This episode was so funny and so clever!!! (^_^)
Your channel has really come a long way and is now my main science channel... THANK YOU!
At 2:30 , if you look with respect to 'bucket' there is a pseudo-force (centrifugal) which acts as it is a non - inertial frame .
So, it explains the force 🤔
Please correct if I am wrong😃
By the way loved the 'Entries' of Einstein
I have a Question:
At 6:08 you said "An objekt not moving thou space"
Not moving relativ to what? The earth, the Galaxy? How can I know that I am not moving?
What is the top speed that I can travel throu Time? How can I mesure it?
Sorry for bad english
To answer your questions we need to understand the differences between space-like and time-like motion. The four ships in this video's example display these alone and together:
Diagonal Ship: Both space-like and time-like motion, this ship is not accelerating. The velocity of the space-like motion is X m/s, something we understand easily using basic physics. The time-like motion has a speed that is curiously measured in seconds per meter, in this case it would be traveling through time at a rate of... 1/X s/m. Yes, you travel a number of seconds through time per meter of space traversed. Remember Einstein's clocks measure time by measuring a photon in motion through space, space is measured in meters; seconds per meter is literally the unit of time-like motion.
Perpendicular Ship: Only time-like motion, this ship has zero velocity and is not accelerating (not possible for reasons, but I'll continue). The time-like motion has a speed of ∞/0 s/m because you would travel infinite seconds for each 0 meters traveled... therefore ships truly at rest have an undefined speed in time-like motion.
Parallel Ship: Only space-like motion, this ship has velocity of exactly C and in not accelerating (and has no mass, somehow). The time-like motion of this third ship is 0/∞ s/m because you would travel zero seconds for each infinite meters traveled... therefore ships traveling at C also have an undefined speed in time-like motion, but it is a different undefined.
Curved Ship: Both types of motion, and is accelerating. Nothing different than the first ship to be honest.
Einstein used a distance metric that included time called the Spacetime Interval, this metric measured the distance between two points, like the endpoints of a ship's path, in such a way that all observers would agree on the interval regardless of their frame of reference while observing some event like a ship path. Spacetime intervals that do not have one component of the interval, the space or time component, are special cases that only work in particular cases. I could go on about it, but I have said enough for now.
Rob Laquiere wow I didn't expect something like this, I didn't understand a word thats fascinating! Thank you for that explanation! No joke
+Felix Vogel You can know that you're moving because it's impossible to stay still in spacetime. In fact, everything is moving through spacetime at the same velocity (the velocity of light). Now how much of this velocity gets transferred to the space or time directions depends on the reference and hence is relative. However, the actual "speed" of everything is always the same. You should take a course in special relativity. It's really interesting. And fascinating as well.
This is not correct. Not everything is moving through spacetime at the same velocity. Remember, velocity is a measurement of speed and direction... surely not everything in spacetime is moving in the same direction. The absolute value of velocity, on the other hand, is the same for the types of matter and energy we have discovered. I don't want to rule out the possibility of discovering matter or energy that does not obey these rules however (I think of Tachyons from Star Trek).
In fact, some hypotheses imply that exotic matter like anti-hydrogen is in fact normal hydrogen moving backwards in time... This means that particle anti-particle annihilation is just two normal hydrogen smashing into each other in the time dimension! One from the future and one from the past! The reason the charges are switched is because we are seeing the anti-particle moving in reverse through time, and thus the EM waves produced by the anti-matter is flipped. QED predicted anti-matter's existence because of these ideas, and we have indeed synthesized anti-hydrogen.
Excellent program and very well narrated.
Is life a thing ?
Somali Pirate Who Pirated Your Girlfriend *Vsauce music ensues*
Depends on definition of life that you meant when asking this question.
You are life.
Somali Pirate Who Pirated Your Girlfriend
life is not a thing. it is a process happening to a thing made up of many other things, and using other things.
Somali Pirate Who Pirated Your Girlfriend
First of all, how dare you pirate my girlfriend that doesn't even exist yet...
Second, Life is what meaning we give to it.
Life has no meaning and thus no significance in the cosmic index.
Life started on Earth some 2 billion years ago, till now our impact on our own Galaxy is beyond insignificant
Him: "Space is just, like a human construct."
Her: "Then you won't mind giving me some."
Well, that sums up my relationship status.
"Einstein said light could travel without a medium"
Wasn't that proved by Michelson & Morley?
Wonton
Einstein’s was wrong. The 1887 MMX recorded the Aether ....but the the speed was not near the .40 fringe shift needed to justify the heliocentric preference.
The laboratory experiments all prove the geocentric model which Einstein detested (ie...God, creator, judgement ...etc)
Einstein invented his 1905 STR to effectively null those laboratory results in order to keep the BS heliocentric model.
Genesis 1:1😊👍🏻
@@reclavea idiocracy achieved!! Have a nice cold glass of Brawndo to celebrate....
John Doe
Lol!
It’s the splendor of truth 😊👍🏻
Genesis 1:1😊👍🏻
@@reclavea go away!!!!
....batin!!
@@daithimac5785
LOL!...Truth can never go away! LOL
It’s the splendor of truth 😊👍🏻
Genesis 1:1😊👍🏻
I'm at 4:00 now and I'm annoyed that no one is like "You are being pushed outward in that spinning motion because you are constantly changing direction - that is why you feel it"
laughed so hard at 0:55
That space time graph is amazing, never thought about relativity like that.
space is...
that long bar on your laptop
your editing job is so wild lately and I love it
The real question is: Is consciousness a thing?
It's information, and things are information. So maybe?
SirMikeys we’re not conscious enough to figure that one out yet..
Our conscious is within space, and space within our conscious...
💭
i think...
"space is a thng" is new to me. space here means distance concept or material made of concept?
But but but... how about Kant's theory of space and time as a priori of human perception?
I'm writing an essay about it and asked myself the Same thing. Have you found any answers yet?
It is not a theory, it can't predict nothing. Just philosophy. You can write whatever you want, but to predict events is far more complex.
JLC You're right. Kant stated a philosphical thing. Physicists don't sit back, think about those things, write down their thoughts and call it a theory. a physics theory needs to be proven with math. talking about these theories, like it is done in this video, is just explaining what the math means for real life
Amazing video , now i do have a question , Objects at rest are moving at top speed through time ? What does that mean ? And what is that speed ? If anyone can enlighten me please do :)
God bathwater... I, m an atheist and this was very funny
Dear Joe, so much to explore and share on this engaging theme, but not on the comments' section, unfortunately shared with many who don't address it rationally and respectfully.
Hey Q/A time: If mass is constantly changed to energy and energy to mass (the reason why we weigh even though ~99% of our body is just blank space*) and if the "void" space out there has energy (CMB or quantum energy fluctuations - whatever you like), Do the Void space between us have mass? And if it does have mass, Doesn't that make void space have its own Gravitational field (Yeah that inward dimple on spacetime )?
* Veritasium had a video explaining this some time ago (yrs ago)
indian stop Lol hindu headass
Earth Mars umm.. What?
link the video
I think you got that a bit wrong. Mass is not changing to energy and back again. Mass IS energy; it's energy that is trapped from traveling at the speed of light. Thus it is energy that experiences time (since, as described in this video, if something does not move at the speed of light then it travels through time instead)
Chaitanya Singh It does not have mass since its made up of "virtual particles" whitout mass. If they however had mass that would break the thermodynamic law about conservation of energy.
The virtual particles have to exist in the first place to satisfy Heisenbergs uncertanty principle about energy and time. The more you know about the energy of a particle (or in this case, vacuum) the less you can know about the time it had that energy and vice verca. Because a classical vacuum would have no energy in it there would be an infinite uncertanty about the time the system had that energy, which is simply not plausible, therefore viritual particles were theorized and later proved to be right by the casmir effect.
If i remember correctly the energy required to make those viritual particles are borrowed from space itself, creating negative matter (not to me confused with dark matter or anti matter) for a very short amount of time.
Sorry for my bad english
All scientists should have their own theme music. It would make the lecture hall more interesting.
I had no idea what he was taking about I just watched the pictures 😂
UA-cam recommended this video for me, but I can't find it on the channel page. Is this video unlisted or something?
Space is also a place
Jack Sprayson it's a Splace... (end me)
The General Theory of Relativity is not inconsistent with Mach's principle. Mach's Principle actually is inspiration for it and might be behind it via how gravity is estructured at a quantum level.
what is that Albert Einstein music
Chicken Guy Channel not available in my country man.
Symphonic power metal makes absolute sense for introducing Dr. Einstein.
ua-cam.com/video/BM2-FY2QEog/v-deo.html
If you're spinning in a bucket in the "empty universe" thought experiment, you're spinning relative to other points on the bucket. That's the whole idea behind angular momentum. Suppose it was a massless bucket, you're still moving relative to you're previous position, or relative to the information of where you were (Velocity and acceleration can be measured based on your initial time and place based on the movement of the object, you just have to have a method of quantifying the initial condition and measuring the change ). The "empty universe" becomes the entire reference frame, so a relative velocity to anything else is irrelevant. My hypothesis is that the other matter in the universe is irrelevant beyond the cosmic horizon.
6:00 THAT'S A REALLY USEFUL PICTURE FOR IMAGINING SPECIAL RELATIVITY.
One of your greatest videos! Also, part of 23andme. Cheers!
...the 'key' to understanding the Universe, is to 'assert' TIME as the FIRST DIMENSION, zero of 1,2,3... where 'O' indicates 'containment'... NOW 'How long is a second' ...(imho) time 'dilates' to allow 'access' and 'contracts' to 'contain' perception ...'alignment' of 'meter' (music) allows a dynamic conversion in 'realtime' (how long is a moment) ...NOW, imagine 'absolute time' and the 'abstraction' of the 'temporal shell' as it floats in the Universe
As usual, awesome video! Pretty interesting how Newton's concept was on the right track he just didn't have all the accumulated knowledge Einstein had access to maybe?
I ordered "23 and Me" because of your endorsement of it on your videos. I'm still waiting for my results.
Videos like this deserves a million likes and views... no, all of your vids deserves it:)
Wow. This is the first time I actually understood a _tiny_ bit about light speed and relativity. That spacetime graphic is _really_ helpful! Thank you!
this video reminded me of a fun question that came to mind when watching "Never Ending Story" about how they treat "The Nothing" as a thing, "You mean like a hole?" "No! a hole would be something... There was just... nothing"
If the absence of something is nothing, then what is in the absence of nothing?
Actually, when spinning with a bucket, you ARE moving relative to the bucket. As the bucket spins around, YOU are pulled by it, not simply spinning with it. You are a separate object which the bucket is acting upon. As such, it spins and gives a tug on you. Then, you in turn have a tendency to continue moving in the direction that you are tugged, but the bucket pulls you away from that direction. That's why you experience force on your body even if there are no other things besides you and the bucket.
I really don't see how spacetime comes into this. I still don't see space or time as things, and in the event that neither of them are actually a thing, spacetime itself cannot be a thing. Zero plus zero does not equal one. If we assume a universe where the bucket and the person are simply spinning on their own without one acting on the other, there would be no centrifugal force.
That Albert Einstein sliding comedy just made my day
As a physicist I'd like to say: excellent video!
@0:17. Wait. What does an “air molecule “ look like?
Bu kanalı çok seviyorum hem İngilizce'mi geliştirmek hem de gezegen hakkında bir şeyler öğrenmek için izliyorum
Awesome 3D diagram of spacetime, it makes it really easy to understand