Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 38, Problem 11P

(a)

To determine

To show: The expression for the fractional shift in the measured wavelength is Δλλ=usc .

(b)

To determine

The recessional speed of the galaxy.

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A light source recedes from an observer with a speed υS that is small compared with c. (a) Show that the fractional shift in the measured wavelength is given by the approximate expression                                                        Δλ/λ ≈ υS/cThis phenomenon is known as the redshift because the visible light is shifted toward the red. (b) Spectroscopic measurements of light at λ = 397 nm coming from a galaxy in Ursa Major reveal a redshift of 20.0 nm. What is the recessional speed of the galaxy?
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Physics for Scientists and Engineers with Modern Physics

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