The best way to percieve a 4 dimensional object would be to imagine a 4D object moving through a 3D space. To make this even easier to imagine, first think of a sphere moving through a 2D plane. If you could only see what was inside that plane, you would see a circle grow from a point, then shrink back down to nothing. A 4D "hypersphere" moving through a 3D space would look like a sphere growing from a point then back down to nothing.
The 4th dimension is not completely even though. Large objects such as black holes bend not only the 3 physical axes, but the 4th as well. That's why things would appear to slow down if they were dropped into a black hole.
That said, I stopped studying physics a long time ago, other than a few very narrow areas of interest, so I might have misremembered something or there might simply be a newer and better theory now.
Fair enough. But there is a difference between 'our current view' and the objective truth. My understanding of the theory, which I admit may be outdated, is that there are (probably) ten dimensions. Of these, we experience three as spacial axes, one as the temporal axis (ie, we travel along it by aging, rather than by moving in the usual sense) and six are entirely beyond our ability to perceive.
Well, so far it has held up pretty good. I'm just trying to explain our current view of the universe.
Unless you hapen to be omniscient, you don't know what the universe is or how it works. We PERCEIVE three axes of physical motion and one of unilateral temporal progression. But since science has proven numerous times that human perception does NOT accurately reflect objective reality, you cannot know that this is actually the case.
This is completely incorrect. We exist in a universe with 3 spacial dimensions and one time dimension, which are NOT the same thing. Also, a 3d shadow would be possible if there were four dimensions of space.
We are 3d beings in a 4d universe who can see in 2d and get a 3d sense through stereoscopic effect. It's fun making higher dimensions, too bad we can't truly percieve them. +1 Fun thought, if we were 4d we would be immortal and travel through time like through regular space. Higher than 2d shadows sadly aren't doable in physical universe, but are in mathematical.
this is all 2 dimensional, since we are looking at a screen. also the physical space is consisting of only 3 dimensions.
but you can make 3d 4d shadows