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Orbison's Illusion
A fishbone pattern in a rectangular frame is superimposed by a rhombus. Adjust the rhombus until you think it has become a square, then check your selection by showing an accurate square. Even the rectangular frame seems to be distorted.
Contributed by:
Sándor Kabai
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Orbison's Illusion
(
Wolfram
MathWorld
)
PERMANENT CITATION
Sándor Kabai
"
Orbison's Illusion
"
http://demonstrations.wolfram.com/OrbisonsIllusion/
Wolfram Demonstrations Project
Published: September 25, 2008
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