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Cube-in-a-Sphere Illusion
A cube is inside a sphere and a sphere is inside a cube. The sphere in the cube seems to be larger even if the two spheres are equal. Move the two figures together and vary the plot range to see that the spheres are equal.




"Cube-in-a-Sphere Illusion" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/CubeInASphereIllusion/
Contributed by: Sándor Kabai
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