The ionisation potential of hydrogen atom is -13.6 eV. An electron in the ground state 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
Text Solution
Verified by ExpertsThe correct answer is:
D
Energy used for excitation is 12.75 eV,
i.e. 
The photons of energy 12.75 eV can excite the fourth level of H -atom. As spectral lines emitted is 
Therefore, six lines will be emitted.
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