A red shift measurement shows that the speed of a distant galaxy relative to an astronomer on
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A red shift measurement shows that the speed of a distant galaxy relative to an astronomer on the Earth is v = 0.25c, where c is the speed of light.
(a) How far away is the galaxy?
(b) If a source of electromagnetic radiation in this galaxy emits blue light with λ = 450 nm (as viewed by an observer at rest in the galaxy), what is the wavelength observed on the Earth? Consider the Doppler shift formulas for light in Chapter 23.
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The speed of the galaxy and its distance from the Earth are linearly related by the Hubble constant ...View the full answer
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Related Book For 
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
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