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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?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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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?
Transcribed Image Text: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?
Expert Solution
Step 1

Given data: 

Time interval (t) = 5.00 ns = 5.00×10-9 s

Total energy (ET) = 0.175 J

Wavelength (λ) = 875 nm

Required:

The average power and number of protons 

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