Question

Why existence of meta stable is an essential requirement for achieving population inversion?

Answer 1

Answer:

During metastable state, all the parameters associated with state hold stationary values. A large number of excited atoms are accumulated in the metastable state. The population of metastable state can exceed the population at a lower level thereby establishing population inversion in a lasing medium

Explanation:

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Answer 2

Answer:

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Explanation:

During metastable state, all the parameters associated with state hold stationary values. A large number of excited atoms are accumulated in the metastable state. The population of metastable state can exceed the population at a lower level thereby establishing population inversion in a lasing medium.