In \( \mathrm{Li}^{++} \), electron in first Bohr orbit is excited to a level by a radiation of ...

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In \( \mathrm{Li}^{++} \), electron in first Bohr orbit is excited to a level by a radiation of wavelength \( \lambda \). When the ion gets de-
\( \mathrm{P} \) excited to the ground state in all possible ways

W (including intermediate emissions), a total of six spectral lines are observed. What is the value of \( \lambda \) ?
[JEE Main - 2019 (April)]
(Given : \( \mathrm{h}=6.63 \times 10^{-34} \mathrm{Js} ; \mathrm{c}=3 \times 10^{8} \mathrm{~ms}^{-1} \) )
(1) \( 9.4 \mathrm{~nm} \)
(2) \( 12.3 \mathrm{~nm} \)
(3) \( 10.8 \mathrm{~nm}(4) 11.4 \mathrm{~nm} \)
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