Rotation Illusion for Radial Wave Motion of Discrete Points

This Demonstration shows an illusion in which the brain perceives an apparent rotation of a figure made up of discrete points. Yet, if you follow a single point, you can see that it oscillates radially with no tangential motion. Set the display options and then select the "play" arrow to animate the points.

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DETAILS

Torrey Pines High School, Advanced Topics in Mathematics II, Fall 2016.
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