How can we know what a four dimensional object looks like?

Question

So i recently saw how a cube would look like in 4 dimensions (Tesseract) but how do we know what it looks like if we live in a 3 dimensional world?

In: 2

Answer 1

This is probably not to the point, but we don’t even “see” in 3 dimensions. Our eyes are not capable of producing 3 dimensional images – light falls on a 2D surface of the retina in our eyes. Our eye has no ability to extract 3D information objectively from this light.

Our brain processes the 2D image from our eyes and essentially creates a perception of 3 dimensional world. Essentially all “looking” is a recreation of the brain.

So we essentially cannot say what a 4D object “looks” like because the human understanding of vision is all created by our brains and we have no wiring in our brains to process a 4D object visually. The best we do is process parts of it and try to interpret.