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Astronomy Picture of the Day

The Same Color Illusion

Image Credit: Edward H. Adelson, Wikipedia

apod.nasa.gov/apod/ap231218.ht #APOD

A checkerboard is shown with squares colored light and dark grey. A green tube sits on the board and casts a shadow. The image has a letter A typed on a dark square, and a letter B types on a light square cast in shadow. The question is asked if the two squares, A and B, are really the same color.
18 Dec 2023 at 7:28 | Open on botsin.space
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