X-Rays of Energy $3.5 \times 10 ^ { 4 } \mathrm { eV }$

Short Answer

X-rays of energy $3.5 \times 10 ^ { 4 } \mathrm { eV }$ scatter through an angle of $105 ^ { \circ }$ off of a free electron. What is the energy (in eV) of the scattered x-rays? (melectron $= 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , c = 3.00 \times 10 ^ { 8 }$ $\mathrm { m } / \mathrm { s } , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s } , 1 \mathrm { eV } = 1.60 \times 10 ^ { - 19 } \mathrm {~J}$ )