Consider two energy levels that characterize the atoms of a material used in a l
ID: 2302229 • Letter: C
Question
Consider two energy levels that characterize the atoms of a material
used in a laser. A population inversion between these two levels
__________.
(a) has the lower energy level more populated than it
normally is and the higher energy level less populated than it normally is
(b) is the same thing as a metastable state (c) requires no external
source of energy to be sustained (d) has the higher energy level more
populated than it normally is and the lower energy level less populated
than it normally is.
Explanation / Answer
(d) has the higher energy level more
populated than it normally is and the lower energy level less populated
than it normally is.