Letter to the Editor July 20, 1990Dear Editor:Sitting in front of me about 6 feet away is a device called a television set. I am watching a performance in what I think is full color and motion. Buy my eye is being fooled: I am not seeing what I think I am seeing.For example, the motion I think I see is due to a property called “persistence of vision.” What appears to be motion is actually made up of many separate still photographs displayed at the rate of 30 “fames” per second. The eye fuses them together in a smoothly blended animation.On closer examination, we discover that the. . . .
Beware of Illusions
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