A meter to measure the optical power of a laser beam is constructed with a thin walled,
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A meter to measure the optical power of a laser beam is constructed with a thin walled, black conical cavity that is well insulated from its housing. The cavity has an opening of D = 10 mm and a depth of L = 12 mm. The meter housing and surroundings are at a temperature of 25.0?C. A fine-wire thermocouple attached to the surface indicates a temperature rise of 10.1?C when a laser beam is incident upon the meter. What is the optical (radiant) flux of the laser beam; Go (W/m2)?
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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