What Color is the Moving Circle?
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Fix your eyes on the cross. There appears to be a colored circle moving but is there really? Slow down the animation to see.[more]
Try different colors for the static circles to change the perceived color of the moving circle.[less]
Contributed by: Jon McLoone (March 2011)
Open content licensed under CC BY-NC-SA
"What Color is the Moving Circle?"
Wolfram Demonstrations Project
Published: March 21 2011