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Projector illumination 3D

Posted on: August 22nd, 2013 by
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A projector in 3D space can illuminate an octant (it's field of view is just wide enough to illuminate exactly 1 octant if placed at the origin). Show that 8 projectors at 8 arbitrary points in space can be rotated so as to illuminate the entire 3D space.

- via Math Puzzles


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