Physics

Problem

A photon of frequency

5.0\times10^{19}\,\text{Hz}

is scattered by a free electron through an angle of

140^{\circ}

. What is the frequency of the photon after the scattering event? a)

4.6\times10^{19}\,\text{Hz}

2.9\times10^{19}\,\text{Hz}

1.4\times10^{19}\,\text{Hz}

4.0\times10^{19}\,\text{Hz}