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Intensity of Illumination; The Foot-Candle

Author: E.E. Kimberly

If a hollow sphere with an inside radius of 1 foot be illuminated by the flame of one standard international candle placed at the center of the sphere, the intensity of the illumination on the inner surface is said to be 1 foot-candle. The foot-candle is the standard unit of illumination.

Last Update: 2010-10-05