Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A certain electronic transition from an excited state to the ground state of the 
atom in one or more than one steps gives rise to four lines in the ultraviolet region of the spectrum. How many lines does this transition produce in the infrared region of the spectrum?
Text Solution
Verified by ExpertsThe correct answer is:
Let the four lines are observed in the ultraviolet region of the spectrum correspond to the transitions:
and 
The possible transitions in the IR region are
and 
Therefore in the infrared region of the spectrum, 3 lines are produced.
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