Whenever a stream of clectrons collides with a stream of photons, in this collision, which of the following is not conserved?

Options

A. Linear momentum
B. Total energy
C. No. of photons
D. No. of electrons

Answer

C

Explanation

In a photon-particle collision (such as photon- electron), the total energy and total momentum are conserved. However, the number of photons may not be conserved in a collision, The photon may be absorbed or a new photon may be created.