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| 1st degree Black Belt
Status: Offline Posts: 250
Thanks Given: 9
Thanked 8x in 6 Posts
Join Date: Jan 2005 Rep Power: 17 |
03-12-2006, 08:30 AM
Here’s one more optical illusion: Quote: |
The Ehrenstein illusion is an optical illusion studied by the German psychologist Walter Ehrenstein in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape.
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