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Rotation Illusion for Radial Wave Motion of Discrete Points

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number of petals
1
2
3
4
5
distance from center
1
plot magnitude
0.6
show lines
show tail
rainbow color
play
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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