February 25, 2017

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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