Look at the square marked A and compare it with the square marked B. Would you believe they are the same shade of gray?
Check out Checkershadow Illusion
After your brain gets fried puzzling over that picture click on More illusions for a multimedia link by Edward H. Adelson from MIT.
Hat tip to Hoots and TheAnchoress
Tuesday, July 19, 2005
Checkershadow Illusion
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