Published by:
CGP EDU Academic Team
Published on: September 12, 2026
PHYSICS
SINGLE CORRECT MCQ
When a 
-atom in ground state is excited by monochromatic radiation of photon energy 
. Then, the number of emission lines will be (given its ionisation energy is 
)
Text Solution
Verified by ExpertsThe correct answer is:
D
PHYSICS
SINGLE CORRECT MCQ
Energy of electron in ground state is
Final energy 
If 
be the value of excited state, then
Now, the number of spectral lines are
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