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GATE Exam
Question: I found there are few options on population inversion. How do I find the correct one?
  • A
    Higher energy state has more population density than lower state.
  • B
    Higher energy state has lower population density than lower state.
  • C
    Both higher and lower states have same population density.
  • D
    Higher energy state has zero population density.

Posted by: D. P. on 19.09.2017

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Answer:

At room temperature lower energy levels have higher population than higher one.But when temperature increases , excitation occurs and population in higher energy level start increasing.Situation when higher energy level has more population than lower one , known as population inversion.Hence answer is A

Answer:

Option A

Answer:
A. Is the correct answer..

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