Cube-in-a-Sphere Illusion

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move
plot range
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.

External Links

Square-in-a-Circle Illusion (Wolfram MathWorld)

Permanent Citation

Sándor Kabai
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​"Cube-in-a-Sphere Illusion"​
​http://demonstrations.wolfram.com/CubeInASphereIllusion/​
​Wolfram Demonstrations Project​
​Published: June 26, 2008