A -ray photon of wavelength strikes a free electron that is initially at rest

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

\gamma

-ray photon of wavelength

1.20\times10^{-12}\,\text{m}

strikes a free electron that is initially at rest. Calculate the magnitude of the photon’s momentum. Use

h=6.63\times10^{-34}\,\text{J}\cdot\text{s}