Which of the following conditions must be satisfied for laser action?
A)A ruby or similar crystalline material must be used.
B)A population inversion must occur.
C)The photons must be red.
D)A binary system must be used.

Question

Quizplus · Accepted Answer

The most important condition for laser action is the presence of a population inversion, where more atoms or molecules are in the excited state than in the ground state. This creates a situation where stimulated emission can dominate over absorption, leading to the amplification of light. The other options are not necessary for laser action. While ruby is a common laser material, other materials can also be used depending on the desired wavelength and properties. Laser light can be of any color, and binary systems are not required.

Which of the Following Conditions Must Be Satisfied for Laser