PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
6th Edition
ISBN: 9781429206099
Author: Tipler
Publisher: MAC HIGHER
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Chapter 34, Problem 72P
To determine

The average power produced by Laser.

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A laser emits 6.85 x 1018 photons per second in a thin beam with circular cross section having diameter 1.2 mm.  The wavelength of the photons is 514.5 nm. What is the laser output power? (enter your answer with 3 significant figures)
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