Which light source operates primarily based on stimulated emission of radiation?
A
laser
B
fluorescent lamp
C
led
D
incandescent bulb
Verified Correct Answer: A.
Physical Principles & Numerical Solution
LASER stands for Light Amplification by Stimulated Emission of Radiation. It works when an incoming photon makes an excited electron release another identical photon, producing a coherent, highly focused beam of light.
Source: Myschool Past Questions Archive (Record #76117)