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What will be the number of spectral line...

What will be the number of spectral lines(N) observed if an electron undergoes transition from `n_(2)` excited level to `n_(1)` excited level in an atom of hydrogen-

A

`N=((n_(2)-n_(1))(n_(2)-n_(1)+1))/(2)`

B

`N=((n_(1)+n_(2))(n_(2)-n_(1)+1))/(2)`

C

`N=((n_(2)+1)(n_(1)+n_(2)+1))/(2)`

D

`N=2(n_(1)-n_(2))(n_(2)+n_(1)-1)`.

Text Solution

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The correct Answer is:
A
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