The intensity of a cylindrical laser beam is 0.800 W / m2 . Cross sectional area beam is 3.0 × 10−4 m2 , and the intensity is uniform throughout the cross section of the lightning. a) What is the average output power of the laser? b) What is the rms (rms) value of the electric field in the beam?

University Physics Volume 2
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ISBN:9781938168161
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Chapter16: Electromagnetic Waves
Section: Chapter Questions
Problem 60P: Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of...
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The intensity of a cylindrical laser beam is 0.800 W / m2 . Cross sectional area beam is 3.0 × 10−4 m2 , and the intensity is uniform throughout the cross section of the lightning. a) What is the average output power of the laser? b) What is the rms (rms) value of the electric field in the beam?

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