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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 series by Johann Jakob 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.
Niels Bohr derived this expression theoretically in 1913. The formula is a generalised to any on electron atom/ion.
The wavelength of first line of Balmer spectrum of hydrogen will be :

A

4340 Å

B

4101 Å

C

6564 Å

D

4861 Å

Text Solution

Verified by Experts

The correct Answer is:
C
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