Задача 50022.

A photon with an energy of 1 MeV is scattered by the free electron at rest. Find the kinetic energy of the electron impact, if as a result of the scattering of a photon wavelength changed to 25%.

A detailed solution with a brief note of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
If you have any questions about the solution, write. I try to help.