if and 4d object casts an 3d shadow on a 3d space, what does it cast on an 2d space ?

Question

I was exploring the internet for 4d space and
object simulations when I found a very interesting site that presents and explains it nicely
But I couldn’t find anywhere mention of what a 4d object projects onto 2d space

Here is the site for anyone interested:
https://ciechanow.ski/tesseract/

Im sorry for bad gramar english is my third language

In: Physics

Answer 1

A 2D shadow. 2D space can’t have more. You can’t have a 3D object on 2D space, only its shadow. So the 4D object would still cast a 2D shadow into 2D space. Imagine a 3D object casting a shadow into 1D space: the 2D shadow is flat. Remove another dimension and it becomes a line. This would be like casting a shadow onto a piece of paper and then looking at the paper from the side.