Multiple Choice
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."
Correct Answer:
Verified
Correct Answer:
Verified
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