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A point source unshaded electric lamp of luminous intensity of 100 candles is 4 ft. above the top of a table. Find the illumination of

A point source unshaded electric lamp of luminous intensity of 100 candles is 4 ft. above the top of a table. Find the illumination of the table at a point 3 ft. from the point directly below the lamp. a. 4 fc b. 3.2 fc c. 6.5 fc d. 10.11 fc

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