Q175
Consider the following statements used in respect of the phenomenon- Population Inversion: 1. It means population in a higher state is higher than that in a lower state 2. It is observed under thermal equilibrium 3. It increases the rate of spontaneous emission 4. It increases the rate of stimulated emission Which of the statements given above are correct?
A.
1, 2, 3 and 4
B.
2 and 3 only
C.
1 and 3 only
D.
1 and 4 only
AnswerAnswer: Option D
Solution
Answer: Option D
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