Physics

Problem

After colliding with a free electron, a photon emerges at an angle of

120^{\circ}

with an energy of

200\,\text{keV}

. What was the photon’s incident wavelength? (Use

hc=1240\,\text{eV}\cdot\text{nm}

and electron Compton wavelength

=2.43\times10^{-12}\,\text{m}

.) a)

0.0062\,\text{nm}

0.0098\,\text{nm}

0.0026\,\text{nm}

0.0050\,\text{nm}