College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Townsend 1.21: A certain photodetector can resolve the time of arrival of a photon to within
2.
108 s. Two of these detectors are used in an anticoincidence experiment, as described in
Section 1.4.
a. What is the maximum average rate of photon emission from the source if there is any
hope of demonstrating anticoincidence?
b.
Assuming the source emits light of wavelength 550 nm, what is the power output of the
source?
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Transcribed Image Text:Townsend 1.21: A certain photodetector can resolve the time of arrival of a photon to within 2. 108 s. Two of these detectors are used in an anticoincidence experiment, as described in Section 1.4. a. What is the maximum average rate of photon emission from the source if there is any hope of demonstrating anticoincidence? b. Assuming the source emits light of wavelength 550 nm, what is the power output of the source?
PM,
Coincidence
Gate
S
counter
РM,
-W
Figure 1.20 A schematic diagram of the anticoincidence experiment of Grangier et al
The source S emits two photons in a cascade decay. Detection of the first photon is used
to generate an electrical pulse which activates the two photomultipliers.
expand button
Transcribed Image Text:PM, Coincidence Gate S counter РM, -W Figure 1.20 A schematic diagram of the anticoincidence experiment of Grangier et al The source S emits two photons in a cascade decay. Detection of the first photon is used to generate an electrical pulse which activates the two photomultipliers.
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