Author Question: The inverted population necessary for laser action A) refers to the negative energy levels of ... (Read 73 times)

khang · **on:** Jul 29, 2018

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 2

A diverging lens cannot be used as a magnifying glass.

Indicate whether the statement is true or false