Trying to find the angle of the velocity vector from a recoiled electron after an impact from a photon.(adsbygoogle = window.adsbygoogle || []).push({});

I have already found the initial energy of the photon, and the energy of the scattered photon, and so can calculate the momentums. I know the photon is scattered at an angle of 110 degrees, and I know from the Compton effect and the difference in the wavelengths what the electron's energy is.

Here is a relevant sketch:

http://upload.wikimedia.org/wikipedia/commons/e/e3/Compton-scattering.svg

Note that theta here is the 110 degrees. I want to know the angle of the velocity vector of that recoiled electron.

Please, if anyone can point a finger at where to go I'd be happy. I've been working on this for quite a long time, trying to turn the initial and final momentum into i and j components, but it is getting me nowhere. I have the feeling the answer is a lot more simple than what I've made it out to be!

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# Homework Help: Compton scattering, angle of recoiled electron

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