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The observed wavelengths in the line spe...

The observed wavelengths in the line spectrum of hydrogen atom were first expressed in terms of a seriesby Johamn Balmer a swiss teacher.
Balmer.s empirical formula is : `(1)/(lambda) = R_(H)[(1)/(2^(2))-(1)/(n^(2))]n=3,4,5`….
`R_(H) = 109678 cm^(-1)` is the Rydberg constant
How many lines in the spectrum will be observed when electrons return from `7^(th)` shell to `2^(nd)` shell ?

A

13

B

14

C

15

D

16

Text Solution

Verified by Experts

The correct Answer is:
C
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