# Momentum of an electron

by DownQuark
Tags: electron, momentum
 P: 2 When finding the momentum of an electron, would you use p=mγv or p=h/λ? It is a massive particle, so which one would you use?
Emeritus
 Sci Advisor HW Helper PF Gold P: 1,992 $$p=mv\gamma$$ in any context. $$\lambda=h/p$$ for the wave function of an electron.