cse • paper_1 • waves_oscillationscse-1997-subject-02-001
Einstein transition coefficients — UPSC CSE 1997 Physics PYQ
Buy PYQ Solution Manual →In a hydrogen atom for the 2\text{p} \to 1\text{ s} transition the probability per unit time is 6 \times 10^8\text{ s}^{-1}. Calculate the angular frequency of the emitted photons and the order of Einstein's coefficient \text{B}_{21}.
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