Question

Multiple Choice (Select 1 out of 4 options, for the question below.)
Population inversion is possible only in elements having
states.
Options
ground
OOO
metastable
unstable
O excited
Clear Response​

Answer 1

Answer:

In science, specifically statistical mechanics, a population inversion occurs while a system (such as a group of atoms or molecules) exists in a state in which more members of the system are in higher, excited states than in lower, unexcited energy states. It is called an "inversion" because in many familiar and commonly encountered physical systems, this is not possible. This concept is of fundamental importance in laser science because the production of a population inversion is a necessary step in the workings of a standard laser.