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An excited hydrogen atom returns to ground state. The wavelength of emitted photon is λ The principal quantum number of the excited state will be

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By Expert Faculty of Sri Chaitanya
a
1λR(λR−1)1/2
b
λR−1λR1/2
c
[λR(λR−1)]1/2
d
λRλR−11/2
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detailed solution

Correct option is D

we know that 1λ=R112−1n2 or 1n2=1−1λR=λR−1λR or n=λRλR−11/2

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