(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A galaxy is moving away from the earth at a speed of [tex]2.3\times 10^7 m/s^1[/tex]. Hydrogen emits light of wavelength 410nm. The speed of light is [tex]3.0\times 10^8 m/s^1[/tex] Calculate th frequency of hydrogen light emission that you would expect to measure on earth.

2. Relevant equations

I'm not really sure! I would have thought judging by what I have done previous to this.

[tex]V=f\lambda[/tex]

[tex] \frac{\Delta f}{f} = \frac {v}{c}[/tex]

3. The attempt at a solution

I really can't think of anything, I would have thought there were 2 steps to it. Possibly the first equation to find the frequency of Hygrogen? I'm really stuck

Help would be great

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# Homework Help: Doppler Effect

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