Checker Shadow

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It’s almost impossible to believe, but square A is exactly the same shade of grey as square B. This illusion is incredibly strong. Even when you’ve seen the proof, your eyes will keep deceiving you. The illusion works for a number of reasons, for example:

  • Your mind compares the┬áchecks to its neighbors.┬áCheck A is surrounded by dark checks and seems lighter.
  • There seems to be a shadow on the board, and your mind assumes that an object in the shadow is darker.

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