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A small point source of light has a mean spherical luminous intensity of 150cd. a. What is the luminous flux given out by the source?
A small point source of light has a mean spherical luminous intensity of 150cd. a. What is the luminous flux given out by the source? b. 30% of the luminous flux emitted from the source falls at right angle onto a surface measuring 3m by 2m. What is the illuminance produced on the surface
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