Q. A $\pi^{0}$ at rest decays into $2\gamma$ rays, $\pi^{0} \rightarrow \gamma + \gamma$. Then which of the following can happen
A) The two $\gamma$’s move in same direction
B) The two $\gamma$’s move in opposite direction
C) Both repel each other
D) Both attract each other
Explanation
(b) They move in opposite direction to conserve linear momentum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.