I'm having difficulty with part C of this question:
The Attempt at a Solution
Using the above equations I correctly calculated the new wavelength of the photon after the collision and using the equations for the photon energies I calculated the energy of the photon before and after the collision to get the change in energy, which I calculated to be 380 eV (I calculated it a few times at varying degrees of accuracy at around 379.6 but the website rounds it up to 380)
Am I doing anything wrong here? Is there some relativistic stuff that I haven't accounted for or is the answer given simply wrong. I'm just using wikipedia and my textbook and it seems like 380 eV should be correct.
If I get a few people here saying that I haven't done anything wrong then I'll email my tutor and get him to change the answer.
Cheers for any replies.