Lasers — CSIR Net PYQ (Question 3)
A Lasers previous-year question (PYQ) from Atomic and Molecular Physics (CSIR Net). Read the question, check the correct answer, then practise the full topic.
Question 3 of 14 · 5.0 marks
A laser operates by using two energy levels of Ne separated by 2.26 eV . Under steady state conditions of optical pumping, the equivalent temperature of the system at which the ratio of the number of atoms in the upper state to that in the lower state will be , is approximately (the Boltzmann constant
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Correct answer: Option 4
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