Concept explainers
(a)
Find the wavelength of the sodium line emitted from the galaxy
(a)
Answer to Problem 47P
The wavelength of the sodium line emitted from the galaxy
Explanation of Solution
A sodium line is emitted from the galaxy
Write the formula Hubble’s law
Write the formula for wavelength [relativistic Doppler effect]
Here,
Conclusion:
Substitute
The recessional velocity is
Substitute
Thus, the wavelength of the sodium line emitted from the galaxy
(b)
Find the wavelength of the sodium line emitted from the galaxy
(b)
Answer to Problem 47P
The wavelength of the sodium line emitted from the galaxy
Explanation of Solution
A sodium line is emitted from the galaxy
Conclusion:
Substitute
The recessional velocity is
Substitute
Thus, the wavelength of the sodium line emitted from the galaxy
(c)
Find the wavelength of the sodium line emitted from the galaxy
(c)
Answer to Problem 47P
The wavelength of the sodium line emitted from the galaxy
Explanation of Solution
A sodium line is emitted from the galaxy
Conclusion:
Substitute
The recessional velocity is
Substitute
Thus, the wavelength of the sodium line emitted from the galaxy
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Chapter 46 Solutions
Physics For Scientists And Engineers With Modern Physics, 9th Edition, The Ohio State University
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