Modern Physics
Modern Physics
3rd Edition
ISBN: 9781111794378
Author: Raymond A. Serway, Clement J. Moses, Curt A. Moyer
Publisher: Cengage Learning
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Chapter 3, Problem 12P
To determine

The number of photon emitted per second.

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What is the wavelength in nm of a photon that has a momentum of 4.5*10^-27 kg.m/s
A boy walks in the evening in the park with a flashlight with a power of 25 W . The flashlight bulb is monochromatic and emits photons with a wavelength of 490 nm . How many photons per second are emitted by the flashlight? To complete the first step, calculate the energy Ep of one photon emitted by the flashlight.
A boy walks in the evening in the park with a flashlight with a power of 25 W . The flashlight bulb is monochromatic and emits photons with a wavelength of 590 nm . How many photons per second are emitted by the flashlight? In step 1, you have determined the energy Ep of one photon emitted by the flashlight. To complete the final step, calculate how many photons per second are emitted by the flashlight bulb.
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