Optical Illusion

April 27, 2010

One of the best optical illusions I’ve ever encountered:

The squares labelled A and B are exactly the same color.

Here is a proof in which the first illustration has been overlain by two gray bars; note how the bars blend equally with square A and square B.

No matter how many times I look at this, and no matter how logically I think about it, I still cannot wrap my mind around the reality.


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