Minggu, 23 Oktober 2011
09.18 | 
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A thaumatrope was a simple toy used in the Victorian era. A thaumatrope is a small circular disk or card with two different pictures on each side that was attached to a piece of string or a pair of strings running through the centre. When the string is twirled quickly between the fingers, the two pictures appear to combine into a single image. The thaumatrope demonstrates the Phi phenomenon, the brain's ability to persistently perceive an image. Its invention is variously credited[citation needed] to Charles Babbage, Peter Roget, or John Ayrton Paris, but Paris is known to have used one to illustrate the Phi phenomenon in 1824 to the Royal College of Physicians.
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Thaumatrope (1824)
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