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Description: This commercially made lamp has a 3-D concave image of King Tut molded into the interior of the pyramid. A bulb lights the face from below creating shadows similar to those made when a convex image is lit from above. Two things happen: the face appears as a normal convex face and it seems to follow the viewer from left to right. Purpose: This optical illusion illustrates how the brain works to make a person see what they expect to see. Faces are normally convex and when a person's nose is to our right, that means they are looking to our right. Our brain expects this and therefore interprets King Tut that way. |
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Applications, Connections & Extensions: See the Connections exhibit "Reverse Mask" for a home-made version of the moving face phenomenon. Classroom Components: This exhibit is popular with psychology students studying human perception.
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