Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
The principle of LASER action involves
A
Stimulated emission
B
Population inversion
C
Amplification of particular frequency emitted by the system
D
All of these
Answer
All of these
Explanation
Solution
Laser action involves all the given phenomenon
(i) Amplification of particular frequency
(ii) Population inversion
(iii) Stimulated emission