A Zoetrope was an early animation method used during the mid 19th century. It consisted of a series of different pictures placed around a cylindrical column. When the column was spun fast enough the images appeared to meld together to create the ILLUSION of movement.
The average human eye can only perceive single images at speeds slower than 10 frames per second (fps). This is why a movie can stream single frames at speeds of 30 fps, but still appear to be motion picture. This is also why a bike’s spokes appear to blend together when they’re rotating quickly.
I was fortunate enough to come across an extremely cool demonstration of this principle, USING a bike wheel.
^_^
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