Ok-1 Optical Illusions
Published: Wednesday 15 March 2006 - Updated: Monday 28 March 2011
To demonstrate an optical illusion that depends upon retention of image for its effect.
- Double ring
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The optical illusion comprises two rings tilted with respect to each other and joined at a common point. When the rings are placed upon the turntable and given a modest rotation speed it appears that the rings are in rotation with respect to each other.