Question

if n1 and n2 are the number of atoms in ground state and excited state then population in version is?​

Answer 1

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.

Answer 2

Answer:

N1 > N2

Explanation:

When N1 > N2, the population of atoms in the ground state is higher than that in the exited state. In this case, absorption is dominant and hence, the intensity of light wave decreases exponentially. 6. To achieve optical amplifications, it is essential to create a non-equilibrium distribution of atoms.