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Asked Feb 19, 2020
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      You observe the H-alpha line of Hydrogen in a distant galaxy to have a wavelength of 918.4  nm. What is the radial velocity of the galaxy?

 

 

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Expert Answer

Step 1

The observed wavelength of a H-α line is 656.28nm.

The radial velocity is given by

Physics homework question answer, step 1, image 1

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