Question

A proton moving with a momentum P1 has a kinetic energy $\frac{1}{8}th$ of its rest mass energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum P2. Then the ratio $\frac{P_1-P_2}{P_1}$ is equal to

• A. 1
• B. $\frac{1}{4}$
• C. $\frac{1}{2}$
• D. $\frac{3}{4}$

Answer 1

Answer: (D)

$\frac{3}{4}$

Answer 2

The correct answer is (D) : $\frac{3}{4}$.