Physics, tech and humor. Because science and learning are cool, and life’s too short not to laugh.
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Of course, the real explanation here is that this is a stroboscopic effect, aka the wagon wheel effect — the rotor speed and the film speed are matched (to some ratio) so there is no apparent movement of the blades for each frame of [...]
Stepping Feet Illusion and radial version
Many other illusions at the site, including some favorites such as
Pinna-Brelstaff Illusion though I never actually call it that
Roget’s ‘Palisade’ Illusion I’ve seen a similar effect while walking past a door and seeing a crt monitor through the narrow gap between the door and jamb.
Motion Binding has a subtle demonstration [...]
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