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Light travels a certain distance in, say, 20,000 years.

Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt ISBN: 9780321909107 29

Solution for problem 19E Chapter 35

Conceptual Physics | 12th Edition

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Conceptual Physics | 12th Edition | ISBN: 9780321909107 | Authors: Paul G. Hewitt

Conceptual Physics | 12th Edition

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Problem 19E

Light travels a certain distance in, say, 20,000 years. How is it possible that an astronaut, traveling slower than light, could go as far in 20 years of her life as light travels in 20,000 years?

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Solution 19E It’s possible because time is not an absolute entity as Galileo had taught us, but it’s relative. Time flows with different speeds depending upon how fast you are moving and the gravitational field you are in. but all these things are relative. In your rest frame time moves as usually. It’s the different frame of references for which your time varies. So, if light take 20000 years to travel a distance you too can travel that distance in 20 years. But those 20 years should be counted in your rest frame, not according to any frame situated in earth. As you move with an enormous...

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Chapter 35, Problem 19E is Solved
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Textbook: Conceptual Physics
Edition: 12
Author: Paul G. Hewitt
ISBN: 9780321909107

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Light travels a certain distance in, say, 20,000 years.

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