Energies of a photon at 500 keV and an electron after Compton scattering.
<a href="//commons.wikimedia.org/wiki/User:%D0%94.%D0%98%D0%BB%D1%8C%D0%B8%D0%BD" title="User:Д.Ильин">Д.Ильин</a>: vectorization, translation
<a href="//commons.wikimedia.org/wiki/File:ComptonEnergy.jpg" title="File:ComptonEnergy.jpg">File:ComptonEnergy.jpg</a> by <a href="//commons.wikimedia.org/wiki/User:AllenMcC." title="User:AllenMcC.">AllenMcC.</a>