The overall luminous efficiency of a 100 W electric lamp is 25 lumen W-. Assume that...
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The overall luminous efficiency of a 100 W electric lamp is 25 lumen W-. Assume that light is emitted by the lamp only in the forward half, and is uniformly distributed in all directions in this half. Calculate the luminous flux falling on a plane object of area 1 cm placed at a distance of 50 cm from the lamp and perpendicular to the line joining the lamp and the object. 2 The overall luminous efficiency of a 100 W electric lamp is 25 lumen W-. Assume that light is emitted by the lamp only in the forward half, and is uniformly distributed in all directions in this half. Calculate the luminous flux falling on a plane object of area 1 cm placed at a distance of 50 cm from the lamp and perpendicular to the line joining the lamp and the object. 2
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Probability & Statistics For Engineers & Scientists
ISBN: 9780130415295
7th Edition
Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying
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