The "inverted population" necessary for laser action
A)refers to the negative energy levels of electrons.
B)comes from upside-down levels in certain atoms.
C)refers to the higher energy state being populated more than one below it.
D)is another way of saying "coherent."
E)is another way of saying "incoherent."

Question

Quizplus · Accepted Answer

In laser action, an "inverted population" means that more electrons are in a higher energy state than in a lower one, which is necessary for stimulated emission to occur.

The "Inverted Population" Necessary for Laser Action