Modern Physics
2nd Edition
ISBN: 9780805303087
Author: Randy Harris
Publisher: Addison Wesley
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Chapter 3, Problem 16E
To determine
Time lag of the photo electron
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Gas molecules in our atmosphere have sizes (~ 10 À) much smaller than the wave-
length of optical photons. As a result, bound electrons within the molecules preferentially
scatter shorter wavelength photons (Rayleigh scattering). The photon cross-section o for
Rayleigh scattering goes as A-4, where A is the photon wavelength. Obtain an expression for
the typical travel time of a red photon (A = 8000 Å) across a layer of atmosphere with thick-
ness d, knowing that a blue photon (A = 4000 Á) has a mean-free-path length lImfp = d/3 in
the same atmosphere. Express your answer using d and c, where c is the speed of light.
(a)
620 nanometers (nm)? (b)
What are the energy and momentum of a photon of red light of wavelength
What is the wavelength (in nm) of photons of energy 2.40 eV?
1.
(a) Calculate the wavelength of light in vacuum that has a frequency of 5.25 x 10¹7 Hz.
nm
(b) What is its wavelength in ice?
nm
(c) Calculate the energy of one photon of such light in vacuum. Express the answer in electron volts.
eV
(d) Does the energy of the photon change when it enters the ice?
O The energy of the photon does not change.
O The energy of the photon changes.
Chapter 3 Solutions
Modern Physics
Ch. 3 - Prob. 1CQCh. 3 - Prob. 2CQCh. 3 - Prob. 3CQCh. 3 - Prob. 4CQCh. 3 - Prob. 5CQCh. 3 - Prob. 6CQCh. 3 - Prob. 7CQCh. 3 - A ball rebounds elastically from the floor. What...Ch. 3 - Prob. 9CQCh. 3 - Prob. 10CQ
Ch. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 13ECh. 3 - Prob. 14ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - What is the stopping potential when 250 nm...Ch. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 21ECh. 3 - Prob. 22ECh. 3 - Prob. 23ECh. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Prob. 27ECh. 3 - Prob. 28ECh. 3 - Prob. 29ECh. 3 - Prob. 30ECh. 3 - Prob. 31ECh. 3 - Prob. 32ECh. 3 - Prob. 33ECh. 3 - Prob. 34ECh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Verify that the Chapter 2 formula KE=mc2 applies...Ch. 3 - Prob. 38ECh. 3 - Prob. 39ECh. 3 - Prob. 40ECh. 3 - Prob. 41ECh. 3 - Prob. 42ECh. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - Prob. 45ECh. 3 - Prob. 46ECh. 3 - Prob. 47CECh. 3 - Prob. 49CECh. 3 - Prob. 50CECh. 3 - Prob. 51CECh. 3 - Prob. 52CECh. 3 - Prob. 53CECh. 3 - Prob. 54CECh. 3 - Prob. 55CE
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