illumination problem
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(mathematics) A mathematical problem, asking whether a room with mirrored walls can always be illuminated by a single-point light source, allowing for repeated reflection of light off the mirrored walls. It was solved in 1958: there are such rooms that cannot be thus illuminated.
illumination problem
The illumination problem in mathematics asks whether a room with mirrored walls can always be illuminated by a single-point light source, and it was settled in 1958 when examples of rooms that cannot be so illuminated were found.
The illumination problem in mathematics asks whether a room with mirrored walls can always be illuminated by a single-point light source, and it was settled in 1958 when examples of rooms that cannot be so illuminated were found.
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