In a Compton Scattering Experiment Using $x$ -Rays, the Wavelength of The

In a Compton scattering experiment using $x$ -rays, the wavelength of the $x$ -rays increases by $5.0 \%$ as the light is scattered at an angle of $60 ^ { \circ }$ with its original direction. What was the original wavelength of the light before scattering? $\left( m _ { \text {electron } } = 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , c = 3.00 \times \right.$ $\left. 10 ^ { 8 } \mathrm {~m} / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } \right)$