\( \mathrm{P} \) Electron in hydrogen atom first jumps from third e...

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\( \mathrm{P} \)
Electron in hydrogen atom first jumps from third excited
W state to second excited state and then from second excited to the first excited state. The ratio of the wavelength \( \lambda_{1}: \lambda_{2} \) emitted in the two cases is:
(2012 Pre)
(a) \( 7 / 5 \)
(b) \( 27 / 20 \)
(c) \( 27 / 5 \)
(d) \( 20 / 7 \)
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