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 28P
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A 18.0-mW (milli-Watts) laser puts out a narrow cylindrical beam 2.40 mm in diameter. What is the average rms E-field?
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