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In this video I show you what a movement through a fourth spatial dimension would look like in our 3D World. I show you what crazy stuff would happen if a 4th dimensional being were to move 4D objects through our 3D space. Weird things happen like the sudden appearing of objects, shape changing, sudden mirror imaging and more! This video is helpful to understanding a 4th spatial dimension using the simplest object…a sphere. This is easier than a tesseract to understand because it looks the same from all directions.
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Okay, everybody today I'm going to be showing you what a ball would look like in a fourth spatial dimension a four D ballSo I'm going to be showing you what a sphere would look like if there were a fourth eshkettitSpatial dimension and then what would it look like if there was some four D being?That was going to move that sphere through the fourth dimensionWhat would it look like in our 3d space?And what other cool stuff could they do if they move stuff around and 4d? What would it look like in our three dimensions?So we live in a universe that has three spatial dimensions. That means you can go this wayYou can go this way and you can go up and down. For example, I have this cube here in three dimensionsBut what would it mean if I were only to look at this cube in two dimensions?Well because we only have two dimensions. It means we can only go this way and this way but not up and downSo it's the equivalent of taking a slice of this cube?So instead of having a cube now, I take a slice of it. So now this is just called a planeIt has the X and the y axis so it has these spatial dimensions, but it has no up-and-downSo that means when you look at it sideways, all you see is a lineSo now we have a world that's only two dimensions. What would a sphere look like in this two dimensions?wellBecause everything in two dimensions is just a slice of three dimensionsInstead of a sphere that has up and down to it. You would only get a slice of that sphereSo a sphere would now look like a circleSo the first thing I want you to notice about this two-dimensional circleIs that for me in three dimensions looking at this two-dimensional plane? I can see the entire circle at one timeI see everything the inside of it the outside of it everything all at oncebut for somebody living in this 2-dimensional worldThey don't see a circleBut they see a line you can see what I mean is I start from above I can see the entire circleBut as I come on to the plane that circle shrinks down and gets flatter and flatter and flatterUntil eventually, it just becomes a flat lineSo if these two dimensional beings live only on this flat plane all they see is linesSo what would a sphere look like to this 2-dimensional person?Well, remember that that 2-dimensional person can only see a slice through the sphere and they would only see it if it's in their planeAnything outside of it, they can't see they only see what's in this plane here.So in order to see this I would have to move it into the plane,but what it would look like from their point of view, it would look like a circle just suddenly appears andthen gets bigger and then smaller and then disappears and so me is a three dimensionalbeing moving this 3d object through their two-dimensional planeWould seem quite mystical it would seem like things suddenly appear then disappear appear thendisappear and with that in mind now we can start to understand what it would be like for aFour-dimensional being to move a four-dimensional object through our three-dimensional spaceso I'm going to show you what it would look like if a four-dimensional being was to move a 4d sphere through our3-dimensional space it would be similar to the two-dimensional circle starting small getting bigger and then going small againBut it would be in three dimensions. So it looks something like thisokay, so here's my four-dimensional ball andWhat you're actually seeing is the very tip of the four-dimensional ballThis is the small circleBut because we're in threeIt's the small sphere at the tip of the fourth dimensional ballAnd I can move it around and do anything that I want with itbut watch what happens when I summon the powers of a fourth dimensional beingTo move the ball through the fourth dimension and through our 3d space. Well, it would look something like thisOkay, they're moving it through the fourth dimension and as he's moving it it's getting bigger and bigger and bigger andStopSo now you can see as it got moved through the fourth dimensionThe size changed in our three dimension hereSo now we have a larger sphere but we're not quite to the center of the four dimensional spheroidSo let's set it down and have the fourth dimensional beam move it through the largest diameter that shows up in our three dimensionsokay, and goso now it's moving, moving through the fourth dimension, whichMaking which is making the spear get bigger and bigger and bigger and our three dimensionsUntil finally we end up with thisSo now the four dimensional sphere oeid is at its largest diameter and our three dimensional spaceandso now I have a very large sphere so we know that a four dimensional being could suddenly appear then disappear in our three-dimensionalspace could make objects randomly appear disappearChange shape altogether and it would seem quite mystical but here's an even weirder thing that 4th dimensional being could doThey can turn you into your own mirror image of yourselfLet me show you what I meanSo going back to our analogy in two dimensions. Here's our two dimensional guySo now suppose in this two dimensional world. He's looking at this object. There's also a mirror behind usSo this line represents a mirror. so looking in that mirror, the mirror image looks like thisBut no matter what he does in this two-dimensional world,he cannot get this object to look like it's mirror image other than just looking in the mirror.But me as a three-dimensional being I can come in and I can take it out of this two-dimensional world flip itAnd now it becomes a mirror image of itselfso because I was a three-dimensional being, and I was able to take it out of this two-dimensional world and flip it in mythree-dimensional world, nowthis is permanently the mirror image of itself for this two-dimensional person now.So the same can be said in three dimensions to four dimensions,That means that this fourth dimensional being could take this pretzel bagFlip it in the fourth dimensionAnd now it would be permanently a mirror image of itself in our three-dimensional world.In fact, you would never be able to hide anything in our three-dimensional world from a fourth dimensional beingEverything would be present at the same time. They'd immediately be able to see what is inside this box.Similar to how I can instantly see what's inside this boxBut this two-dimensional person wouldn't be able to see it because it's being blocked by the outside.So it would be quite amazing to see some fourth dimensional thing moving through our three dimensions and making thingsreappear, change shapes, do all sorts of different things even making mirror images of things.But is there a fourth dimension of space? Well, actually there could beString theory actually suggests that there's 11 spatial dimensions,But only three of them are big enough to notice.So we have three spatial dimensions that are big enough to see any changes,But the other dimensions aren't big enough to notice any difference with movement.Hey everybody. Thanks for watching another episode of "The Action Lab"I hope you enjoyed it. if you did and you're not subscribed yetremember to hit the subscribe button and hit the bell to be notified with my latest videos out andhead to the action lab comm to check out the action labsubscription box where you can do experiments similar to the ones that you see me do on my channel.Thanks for watching and I'll see you next time!
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