What is the phenomenon that makes a spoked wheel when turning at a certain speed appear to rotate backward?

What is the phenomenon that makes a spoked wheel when turning at a certain speed appear to rotate backward?
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1 Answer

Answer :

Don't remember what it's actually called, but basically-- the camera is capturing at, say, 30 frames per second, and at its simplest, the wheel is spinning at 30 times per second. With an 18" wheel, that's something like 96 miles per hour, so it's more likely the wheel is rotationally symmetric. If the wheel has 6 spokes, than you could get the "stopping" at as low as 16 mph.
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