You have to believe this : A Color IllusionEdit
Here is another brain teaser, An Optical illusion of Checks grey and white. It's a cylinder placed on a checks platform, shadow of the cylinder is over partial checks. Here we have labelled 2 Squares A and B. Now the puzzle is COLOR of SQUARE 'A' and SQUARE 'B' are exactly same! Do you believe? Yes, you have to believe this! They are exactly same. You can check hiding all other parts of the photo and comparing only the squares in question. The illusion is due to the shadow of the cylinder on square 'B' makes us feel its lighter than square 'A'.
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An optical illusion (also called a visual illusion) is characterized by visually perceived...