An interesting optical illusion occurs when we stare at moving figures.If two men agree on everything, you may be sure that one of them is doing the thinking. - Lyndon B. Johnson
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Motion After Effect

Aristotle is reported to be the first person to ever report on seeing a stationary object move AFTER having watched a constant movement.

The neurons of the eyes will adapt both to a static image, as in the after effect phenomena, and to motion. This is easily explained that neurons that have been firing repeatedly will be less likely to fire as often when a stimulus has been removed.

See the Illusion

This was a very difficult illusion to recreate, and the result, when you see it, can be quite subtle.

Concentrate on the moving symbols in the graphic below for about a minute. At the end of a minute, stop the graphic from moving, in internet explorer by clicking on the Stop button, and with Firefox by clicking on the window boarder.

You'll need to wait for 5 to 10 seconds your eyes to calm down from all that motion, and then you should see the blocks either start floating up, or elongating upwards very slightly.

 

Color Oprical Illusion

 

Home Light Speed of Light Additive and Subtractive Colors CIE 1931 Color Space Colorimetry Color Space Color Temperature Spinning Color Top Glossary of Color Terms History of Color Science Metamerism Motion After Image Munsell Color System TriStimulus Refraction Double Slit Polarization Human Eyesight The Retina Color Optical Illusions More

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