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May 28, 2015

Homework Help: physics

Posted by Joan on Wednesday, May 18, 2011 at 12:14am.

A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16 1014 Hz. When the same light from hydrogen atoms in a distant galaxy is observed on earth, the frequency is 5.21 1014 Hz. Calculate the speed at which the galaxy is receding from the earth (in units of the speed of light, c).

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