cse • paper_1 • thermal_physics
[UPSC CSE 2026] Statistical Physics (Q243, 10M)
The average kinetic energy of hydrogen atoms in a certain stellar atmosphere, assumed to be in thermal equilibrium, is 1\cdot 2\text{ eV}. Calculate the ratio of the number of atoms in the second excited state (n = 3) to the number in the ground state.
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