When light passes through a glass prism, it splits into a rainbow of colors.


A TRICK OF THE EYE?


Sometimes the eyes deceive. Optical illusions are pictures with patterns, colors, and shapes that can seem puzzling to people. In this illusion, the circles seem to be spinning. But it’s just a trick of the eye brought on by the colors and pattern in the drawing. Researchers think it happens because the eyes naturally dart about as we look at something. These abrupt movements make the pattern seem to move.


JANUARY–FEBRUARY 2016 15


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