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Image: Revolving circles

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Original image(SVG file, nominally 350 × 350 pixels, file size: 4 KB)

Description: The two circles seem to rotate when the viewer's head is moving back and forth while looking at the black dot.
Title: Revolving circles
Credit: Own work
Author: Fibonacci
Permission: GFDL
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes

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