Answer to Question #282058 in Atomic and Nuclear Physics for BIGIRMANA Elie

Question

7. In the Helium-Neon laser, lasing occurs between two excited states of the neon atom. However, in many lasers lasing occurs between the ground state and an excited state. Consider

such a laser that emits at wavelength λ = 550 nm. If a population inversion is not generated,

(i) what is the ratio of the population of atoms in state Ex to the population in the ground

state E0 with atoms at room temperature? For the condition in (i), at (ii) what temperature

would the ratio Nx/N0 be 1/2?.

Answer 1

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