The zoetrope was invented in 1834 in England by William Horner. He called it the "Daedalum'' ('the wheel of the devil). It didn't become popular until the 1860s, when it was patented by makers in both England and America. The American developer, William F. Lincoln, named his toy the 'zoetrope', which means 'wheel of life.A zoetrope is relatively easy to build. It can be turned at a variable rate to create slow-motion or speeded-up effects. Like other motion simulation devices, the zoetrope depends on the fact that the human retina retains an image for about a 1/10th of a sec so that if a new image appears in that time, the sequence was seem to be uninterrupted and continuous. It also depends on what is referred to as the Phi phenomenon, which observes that we try to make sense out of any sequence of impressions, continuously relating them to each other.
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