A galaxy is moving away from Earth. The blue hydrogen line at 434nm emitted from the galaxy

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A galaxy is moving away from Earth. The “blue” hydrogen line at 434nm emitted from the galaxy is measured on Earth to be 650nm.
(a) How fast is the galaxy moving?
(b) How far is it from Earth?

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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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Question Posted: Aug 19, 2010 12:05 AM

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A galaxy is moving away from Earth. The blue hydrogen line at 434nm emitted from the galaxy

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a Use Eqs 334 and 335a to solve for the speed of the gal...View the full answer

Fundamentals of Physics

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