Question

In pair annihilation electron and positron combined to form photon. In this process-

• A. Heavy nucleus is required for the process to occur
• B. Two photons are formed which move in same direction
• C. Two photons are formed which move in opposite direction
• D. Linear momentum is not conserved

Answer 1

Answer: (C)

Two photons are formed which move in opposite direction

Answer 2

e^– → γ + γ

Two gamma photons are formed which move in opposite direction to conserve linear momentum