The ionisation potential of hydrogen-atom is -13.6 eV. An electron in the groundstate of a hydrogen-atom absorbs a photon of energy 12.75 eV. How many different spectral lines can one expect when the electron make a downward transition?

Options

(a) 1
(b) 4
(c) 2
(d) 6

Correct Answer:

6

Explanation:

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