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MHT CET 2020 (16 Oct, Shift 2) · Transitions, Photon Emission & Excitation

Transitions, Photon Emission & Excitation question from MHT CET 2020 (16 Oct, Shift 2)

Q50MHT CET 2020 · 16 OCT · SHIFT 2Medium

Transitions, Photon Emission & Excitation

The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) second to first energy level and (ii) highest energy level to second level is respectively

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Answer: (b)

$E \propto \left(\frac{1}{n_f^2}-\frac{1}{n_i^2}\right)$
$2\to1$ : $1-\frac14 = \frac34$ . $\infty\to2$ : $\frac14$ .
Ratio $= \frac34 : \frac14 = 3:1$
So the answer is (b) $3:1$ .

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