The impression of smooth motion that comes from the rapid alternation of objects appearing in nearby locations in rapid succession is

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Apparent motion is the phenomenon where the perception of motion is created by a series of stationary images shown in rapid succession, rather than by an object actually moving. This is the principle behind motion pictures and animations, where a sequence of still frames appears to be moving due to the rapid alternation of images.

The Impression of Smooth Motion That Comes from the Rapid