Optical Illusions

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Counter-Rotating Spirals Illusion

http://dogfeathers.com/java/spirals.html More Java applets here . If your browser supports Java , you should see an animated image above (generated by a Java applet embedded on the page). Otherwise, you should see a static image.

Rotational illusion

R o t a t i n g i ll u s i o n http://www.ritsumei.ac.jp/~akitaoka/rotate-e.html