A photon of `1.7 xx 10^(-13) joules` is absorbed by a material under special circumstances. The correct statement is

Options

A. Electrons of the atom of absorbed material will go the higher energy states
B. Electron and position pair will be created
C. Only position will be produced
D. Photoelectric effect will occur and electron will be produced

Answer

B

Explanation

For electron and positron pair production , minimum energy is `1.02 MeV`.
Energy of photon is given ` 1.7 xx 10^(-3) J`
`= (1.7 xx 10^(-13))/(1.6 xx 10^(-19)) = 1.06 MeV`.
Since energy of photon is greater than `1.02 MeV`, So electron , positron pair will be created.