A hydrogen atom is in an excited state of principle P quantum numbe...

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A hydrogen atom is in an excited state of principle
P quantum number \( n \). It emits a photon of wavelength \( \lambda \)

W when returns to the ground state. The value of \( n \) is
(1) \( \sqrt{\lambda R(\lambda R-1)} \)
(2) \( \sqrt{\frac{(\lambda R-1)}{\lambda R}} \)
(3) \( \sqrt{\frac{\lambda R}{\lambda R-1}} \)
(4) \( \sqrt{\lambda(R-1)} \)
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