P12.27 Pulsed lasers are powerful sources of nearly mono- chromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 0.175 J at 875 nm are commercially available. a. What is the average power (energy per unit time) in units of watts (1 W = 1 J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
P12.27 Pulsed lasers are powerful sources of nearly mono- chromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 0.175 J at 875 nm are commercially available. a. What is the average power (energy per unit time) in units of watts (1 W = 1 J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter28: The Atom
Section: Chapter Questions
Problem 41A
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