MCQ - 41-10508

Correct Answer: A

Explanation:

Conservation of total energy for pair production = hv = E– + E+ = (m₀c² + K_–) + (M₀c² + K+) = K_- + K₊ + 2m₀c²
Here, E- and E+ represent total energy of the electron and positron, and K_- and K₊ represent the kinetic energy of the electron and positron. Also, m₀c² = 0.511 MeV, and it is the rest mass energy of an electron, which is equal to that of the positron. That is, both the two particles have the same amount of rest mass energy, and from this, we can get the sum, 2m₀c² = 1.02 MeV.