Question

Radiation of certain frequency is emitted when electronic transition occurs from n = 4 to n = 2 in He
which transition in H atom gives radiation of the same frequency?
1) n = 4 to n = 2
2) n = 3 to n = 2
3) n = 3 to n = 1
4) n = 2 to n = 1
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Answer 1

Answer:

n=2 to n=1

the explanation is in the photo

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