Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

Hey guys, I have a final tomorrow and I am going over some assignments. One of the questions from the assignment was:

A photon having 37 keV scatters from a free electron at rest. What is the maximum energy that the electron can obtain?

Now, I got the right answer (4.67 KeV) but I can't seem to figure it out now. Maybe I am just too tired. Any hints to where I should begin?

share|improve this question

1 Answer 1

up vote 3 down vote accepted

There is only one parameter in the system. You have several choices, but you might use the scattering angle, $\Theta$, of the photon in the electrons initial rest frame.

Now conserve 4-momentum, and write the final state energy of the electron as a function of $\Theta$ and maximize.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.