An 85 x 11cm sheet of metal is illuminated by a light
An 8.5 x 11cm sheet of metal is illuminated by a light source located 1.3m directly above it. What is the luminous flux falling on the metal if the source has an intensity of 200cd? What is the total luminous flux emitted by the light source?
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an 85 x 11cm sheet of metal is illuminated by a light source located 13m directly above it what is the luminous flux
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