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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.

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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.
https://files.botsin.space/media_attachments/files/111/600/237/576/207/700/original/b81d83a3b3e949a8.jpg

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Astronomy Picture of the Day (apod@botsin.space)'s status on Monday, 18-Dec-2023 16:28:47 JST Astronomy Picture of the Day

The Same Color Illusion
Image Credit: Edward H. Adelson, Wikipedia
https://apod.nasa.gov/apod/ap231218.html #APOD

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