In the Compton Scattering Experiment Shown in the Figure, a Monochromatic

Multiple Choice

In the Compton scattering experiment shown in the figure, a monochromatic beam of X-rays strikes a target containing free electrons. Scattered X-rays are detected with a wavelength of 2.50 × 10^-12 m at an angle of 45° away from the original beam direction. What is the wavelength of the incident monochromatic X-rays? Note: The mass of an electron is 9.11 × 10^-31 kg.

A) 3.21 × 10^-12 m
B) 2.86 × 10^-12 m
C) 2.50 × 10^-12 m
D) 2.03 × 10^-12 m
E) 1.79 × 10^-12 m