Consider a two-level system in which the excited state, separated from the ground state by energy $\in$, is doubly degenerate. The fraction of the molecules in the excited state, as $\mathrm{T} \rightarrow \infty$ is
(a)$\frac{1}{2}$
(b)$-\frac{1}{2}$
(c)$\frac{2}{3}$
(d)1
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
As T → ∞ all levels become equally populated; with the excited level doubly degenerate the excited fraction is 2/3.