illumination problem

From Wiktionary, the free dictionary
Jump to navigation Jump to search

English[edit]

English Wikipedia has an article on:
Wikipedia

Etymology[edit]

illumination +‎ problem

Noun[edit]

illumination problem

  1. (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.