Question

Explain what you see in the image on the left, verses the image on the right. What a person sees when looking at the above two pictures depends on what concept?

Answer 1

@uri

Answer 2

I don't remember exactly what it is called, but when you look at the first one it looks like a fancy cup, where as the second image you can clearly see two faces. But both images are the exact same. Just the coloring is switched.