physicsfun on Instagram: "3D Phonotrope Spinner: slinky on an escalator! When the rate of rotation matches the rate of the smartphone video process (wait for it) 12 animated 3D-printed slinkys “spring” into motion. The 3D printed and precisely placed depictions of the famous toy is specifically designed to interact with the video process, similar to the animation effect of a flip book, but in a repeating cycle like that of the phenakistiscope, the 1833 invention that started moving media animati

Insidee Out on Instagram: "Before screens and streaming, motion was born from patience, gears, and human curiosity Long before televisions existed, people experienced moving images by turning a simple hand-cranked device. Machines like the zoetrope and phenakistoscope flipped illustrated frames so quickly that the brain stitched them into motion. This worked because of persistence of vision-the brain briefly holds each image, blending them into a continuous scene. For the first time, drawings ap

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