# Fundamental Physics/Motion/Momentum of a massless quanta in motion

 Speed ${\displaystyle v}$ ${\displaystyle {\sqrt {\frac {1}{\mu \epsilon }}}=C=\lambda f}$ Energy ${\displaystyle E}$ ${\displaystyle E=pv=pC=p\lambda f=hf}$ Momentum ${\displaystyle p}$ ${\displaystyle p={\frac {h}{\lambda }}}$ Wave length ${\displaystyle \lambda }$ ${\displaystyle \lambda ={\frac {h}{p}}}$