Optical Illusions

Which blue line is the longest?

 

Solution - Both blue lines are the same length. However, the brain always tries to interpret what it sees. The left hand image reminds us of the outside of rectangular object (for example the corner of a building). The right hand image looks like the inside of a shape (for example, the corner of a room). Our brain, interpreting the images differently, imagines they are different sizes..

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