Physics

Problem

500\,\text{keV}

\,\gamma

-ray photon collides with a free electron and is scattered through

90^{\circ}

. Which of the following is closest to the energy of the scattered photon? a)

440\,\text{keV}

500\,\text{keV}

253\,\text{keV}

170\,\text{keV}