Solved: A meter to measure the power of a laser beam is
Chapter , Problem 13.33(choose chapter or problem)
A meter to measure the 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 25.0C. A fine-wire thermocouple attached to the surface indicates a temperature rise of 10.1C when a laser beam is incident upon the meter. What is the radiant flux of the laser beam, Go (W/m2 )?
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