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Old 09-September-2005, 08:34 AM
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Fram Fram is offline
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In movies, it has to do with the beta movement, the phi phenomenon, and perhaps persistence of vision (this one is disputed nowadays).
An early researcher was Joseph Plateau (with my apologies for the ironically bad visual layout of this site about visual media).

In real life, the reverse rotation effect, as it is called, is supposed to be rare, although my experience is that many people do experience it.
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