A light source emits monochromatic light of wavelength 555 nm. The source consumes 100 W of electric power

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asked Mar 29, 2018 in Physics by Nisa (2,540 points) 1 3
A light source emits monochromatic light of wavelength 555 nm. The source consumes 100 W of electric power and emits 35 W of radiant flux. Calculate the overall luminous efficiency.

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answered Mar 29, 2018 by rubby (7,550 points) 1 3 5
selected Apr 1, 2018 by Vikash Kumar
 
Best answer

Overall luminous efficiency =Total luminous flux / Power input
=35x685/100

= 239.75 lumen/W

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