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Physics / College Physics 1 / Chapter 28 / Problem 13

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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All galaxies farther away than about 50 × 106 ly exhibit a

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Problem 13CQ

All galaxies farther away than about 50 × 106 ly exhibit a red shift in their emitted light that is proportional to distance, with those farther and farther away having progressively greater red shifts. What does this imply, assuming that the only source of red shift is relative motion? (Hint: At these large distances, it is space itself that is expanding, but the effect on light is the same.)

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QUESTION:

Problem 13CQ

All galaxies farther away than about 50 × 106 ly exhibit a red shift in their emitted light that is proportional to distance, with those farther and farther away having progressively greater red shifts. What does this imply, assuming that the only source of red shift is relative motion? (Hint: At these large distances, it is space itself that is expanding, but the effect on light is the same.)

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Solution 13CQ

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