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with the help of Rydberg formula find th...

with the help of Rydberg formula find the wavelength of first line of Pfund series .

Text Solution

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`1/lambda=R(1/n_f^2- 1/n_i^2)`
For first line of Pfund series, `n_i`=6 and `n_f`=5
`therefore 1/lambda=R(1/5^2-1/6^2)`
`rArr lambda=900/"11R"`
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