A hypercube or Tesseract. I'm just guessing based on my knowledge of the movie Cube 2: Hypercube. Quite the interesting movie. Horrible acting but pretty cool story/effects. Anyway my friend could explain this better but I believe he said something like the fourth dimension is sound or something weird like that. I can't be too sure. It has to do with us only being able to physically see 3 dimensions....but there are actually multiple dimensions after that - that we can't experience.

Sorry I couldn't help....but most the people here seem to have good answers.

I have heard of this but never really looked in to it. I still really do not understand what the fourth dimension is, picture? Or something to explain it?

This is just what I was taught
What Is The Fourth Dimension?

I'm sure a lot of what was said is already right, but one thing that I found is that time is the fourth dimension according to Einstein and physicists, but I think what the original question was about is the fourth-SPATIAL-dimension.

A while back I was in Algebra II (I think) and I was bored with class so I asked my teacher about the fourth dimension. It seemed like he understood what it was pretty well, but I don't really know for sure. Most of what he said was about the spatial fourth-dimension cube, or tesseract.

He started off by saying that there isn't a physical shape to the tesseract, but if you could see it at the most basic level, it would look like a cube (thus the hypercube name). The thing that makes this cube hyper is that every side of the cube touches the exact opposite side. So for example, if the room you are in right now were to be a hypercube, you would fall through the floor, only to come right through the ceiling.

This is also how big-bang theorists view the fourth spatial dimension. Normally people think the big-bang was a very dense point that exploded outward, like a balloon that is inflated. However, the more consistent theory is that the fourth dimension is expanding, which gives more 3D space for the universe. This is like if you had a pool that had 100 fish (planets/galaxies) and very little water (3D space). Let's say there was 100 gallons of water, so for every gallon of water there would be one fish, and all these fish would be very close together. Then there was the "Big-Fill-up" which poured 1,000,000 more gallons of water into the pool. At this time, the fish (planets) would have much more water (space) for themselves.

But that's just what I heard... Lol

-reply by Confucioud

ya 13d
What Is The Fourth Dimension?

Whos to say there is not more. 13 so far. Still looking everyday. Better just to stay here. You'll get a try bit and some confrustion. Ya better to stay in 3d.

-reply by jimbo jones

For public, the fourth dimension is the time as used by the realtivity theory of Einstien.

But for mathematians, we can use n-dimension and build theories on them too. Of course any geometry more than 3 can't be represented in the real word.

I really dont think the fourth dimention is time. It could be a something but time but like Dooga said it can allow two points to be in the same position with out overlaping. It can allow us to turn a soccer ball inside out without damaging the surface. Sounds impossible, huh? Well think of it this way. If u and I r point on a plane-say a paper 1^{-999999999999999...} -so thin we can ignore the thickness. On this plane we are a metre apart and there is no way we can ever dream of coming in contact without closing the gap. Now when we introduce the z-axis the plane can be folded so that we can come in contact without attempting to close the gap btwn us. In the fourth dimention u could be some where close to me right now

Most pple will trell you about the posibilities opened by having 4 dimensions but will not explain just what this thing is. In mathematic our teacher told us that when we try to solve an equation and we find the answer has square roots of negative numbers it means the roots are the additional dimention. So if u plot the graph for y=x(1+x²) you will only see the other point where it touches the y-axis if you look at it in 4D-but how can u do that. This is so mind boggling but the subject is interesting

This post has been edited by kudmus: May 6 2008, 02:35 PM

What is the fourth dimension?


That was from wikipedia. Did anyone actually UNDERSTAND what all that load of nonsense (at least to me) meant?

And they went on about things like shining light on different dimension objects to produce different dimension shadows etc. How extremely confusing...

4demension
What Is The Fourth Dimension?

I don't think we can see above our demension but we can only see below it.There might be a thousand demensions but we only have a limited mind to understand it.