Q. A photon of $1.7 \times 10^{- 13}\ Joules$ is absorbed by a material under special circumference. The correct statement is
A) Electrons of the atom of absorbed material will go the higher energy states
B) Electron and positron pair will be created
C) Only positron will be produced
D) Photoelectric effect will occur and electron will be produced
Explanation
(b) For electron and positron pair production, minimum energy is $1.02\ MeV$
Energy of photon is given $1.7 \times 10^{- 3}J = \frac{1.7 \times 10^{- 13}}{1.6 \times 10^{- 19}}$
$= 1.06\ MeV$
Since energy of photon is greater than $1.02\ MeV$
So electron positron pair will be created
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.