Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The ionisation energy of hydrogen atom is 
. An electron in the ground state of a hydrogen atom absorbs a photon of energy 
. How many different spectral lines can one expect when the electron makes a downward transition?
Text Solution
Verified by ExpertsThe correct answer is:
NOT AVAILABLE
Energy used for excitation is 
, i.e. 
The photons of energy 
can excite the fourth level of 
-atom.
where, 
So, number of spectral lines 
Therefore, six lines will be emitted.
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