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What is population inversion? Explain its significance in laser.
written 7.7 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 7.7 years ago

Mumbai university > FE > SEM 2 > Applied Physics II

Marks: 3M

Year: May 2013
advanced engineering physics
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written 7.7 years ago by gravatar for teamques10 teamques10 ★ 65k modified 2.3 years ago by gravatar for sdarnad965 sdarnad965 • 30

  • Population inversion is the state in which the number of atoms in a higher energy state is more than those in a lower energy state.

    • It is required in laser so that stimulated emission is more probable than induced absorption.

    • Generally, more no. of atoms are in lower energy states. …

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