A glass tube contains 2 X !011 atoms, some of which are
Chapter 29, Problem 23(choose chapter or problem)
A glass tube contains 2 X !011 atoms, some of which are inthe ground state and some of which are excited. Figure Q29.23shows the populations for the atoms' three energy levels. ls itpossible for these atoms to be a laser? If so, on which transitionwould laser action occur? If not, why not?
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