12 Physics Dual Nature Of Radiation And Matter - Set No : 8 Question No :9
Question No : 9
A photon
of  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 |
Answer No : 9
(b)For
electron and positron pair production, minimum energy is  Energy
of photon is given   Since
energy of photon is greater than So
electron positron pair will be created |