Stroboscopic Effect
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PHYSICS
Optics and Visual Phenomena
Stroboscopic Effect
Stroboscopic flashes reveal hidden motion by syncing light pulses with moving objects
23 Jan 2026
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Why does the wagon-wheel effect cause a wheel to appear as if it is rotating backward in videos?
Because the frame rate of the video samples the wheel's position at intervals that create an aliasing effect, making the motion appear reversed.
Because the wheel physically reverses direction periodically during rotation.
Because the lighting conditions cause shadows that trick the eye into seeing backward motion.
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