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A hydrogen sample is prepored in a parti...

A hydrogen sample is prepored in a particular state A photon of energy `2.55eV` gel obserbed into the sample to take some of the electron ti a farther excited state B find the quantum numbers of the state A and B

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The allowed energies of hydrogen atoms are
`E_(1) = - 13.6eV`
`E_(2) = - 3.4eV`
`E_(3) = - 1.5eV`
`E_(4) = - 0.85eV`
`E_(5) = - 0.54eV`
We see that a difference of `2.55eV` can only be observed in transition`n = 2 to n = 4` so the state A has quantum number`2` and the state B has quantum number`4`
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