Spiral of Circles Optical Illusion

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The image appears to be a spiral, but in fact is a series of squares arranged in four concentric circles. You can untangle the illusion by checking "show the circles" and by setting "rotate squares" to about 1.2.

Contributed by: Marya Rana (February 2017)
Open content licensed under CC BY-NC-SA



This was a project for Advanced Topics in Mathematics II, fall 2016, Torrey Pines High School, San Diego, CA.

Adapted from Confusing Circles at [1].


[1] "10 Optical Illusions That Will Blow Your Mind (Photos)." The Huffington Post. (May 23, 2013) www.huffingtonpost.com/2013/05/23/10-optical-illusions-that-will-blow-your-mind_n _ 3307500.html.

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