Recent content by Helgi

I am having the same problem. Could you elaborate on what you mean by substituting the identity? Edit: scratch that. I figured it out.

Homework Statement The problem involves an atom (Said to be in an excited state of energy Q_0) traveling towards a scintillation counter with speed v. The atom then emits a photon of energy Q and stops completely. The rest mass of the atom is m. I'm supposed to show that Q =...