A transition for \( \mathrm{H} \)-atom from II to I orbit has same wavelength as from nth to \( ....

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A transition for \( \mathrm{H} \)-atom from II to I orbit has same wavelength as from nth to \( 2^{\text {nd }} \) orbit for \( \mathrm{He}^{+} \)ion.
\( \mathrm{P} \)
What is the value of " \( n \) "?


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