Wolfram Demonstrations Project
8773

Length of Line Illusion

Can your eyes deceive you? Adjust the length of the upper red line until you think its length is equal to that of the lower red line. Then check your selection by rotating the top red line to the lower one.

THINGS TO TRY

SNAPSHOTS

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PERMANENT CITATION

 Sándor Kabai
"Length of Line Illusion"
 http://demonstrations.wolfram.com/LengthOfLineIllusion/
 Wolfram Demonstrations Project
 Published: March 7, 2011
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