Published by:
CGP EDU Academic Team
Published on: August 12, 2026
No. of visible lines when an electron returns from 5th orbit upto ground state in H spectrum :
Text Solution
Verified by ExpertsThe correct answer is:
A
First we find the total number of transitions. They are as follows.
………..(4) transitions
…………..(3) "
………(2). "
……………..(1). "
Total number of transitions is 
.
Now, we know that lines of Balmer series in H - atom spectrum fall in visible region. The transitions TO 
level gives Balmer series. So,transitions (5,2), 
and 
give (3) visible spectral lines if initial level is 
.
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