The active volume of a laser constructed of the semiconductor GaAlAs is only 200 mm3 (smaller than a grain of sand), and yet the laser can continuously deliver 5.0 mW of power at a wavelength of 0.80 mm.At what rate does it generate photons?

The active volume of a laser constructed of the semiconductor GaAlAs is only 200 mm3 (smaller than a grain of sand), and yet the laser can continuously deliver 5.0 mW of power at a wavelength of 0.80 mm.At what rate does it generate photons?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 57P

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Question

The active volume of a laser constructed of the semiconductor
GaAlAs is only 200 mm3 (smaller than a grain of sand),
and yet the laser can continuously deliver 5.0 mW of power at a
wavelength of 0.80 mm.At what rate does it generate photons?

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