An $x$ -Ray Photon with Wavelength $15.0 \mathrm{pm}$ Is Scattered Through $84.0^{\circ}$ By an Electron

Multiple Choice

An $x$ -ray photon with wavelength $15.0 \mathrm{pm}$ is scattered through $84.0^{\circ}$ by an electron. What is the resulting kinetic energy of the electron?

A) $10.5 \mathrm{keV}$
B) $59.5 \mathrm{keV}$
C) $15.0 \mathrm{keV}$
D) $568 \mathrm{keV}$
E) $30.1 \mathrm{keV}$