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What is the formula to calculate barv ( ...

What is the formula to calculate `barv` ( wave number) of spectral lines in hydrogen?

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`barv=1/(lamda)=R[1/(n_(1)^(2))-1/(n_(2)^(2))]` Where `barv`= wave number, `lamda`= wavelength of radiation.
R = Rydeberg constant=1.0967800 `m^(-1) n_(1)` = Integer (1, 2, 3, 4 (5) respectively)
`N_(2)`=Integer [Its value is greater than `n_(1)`]
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