Write the Balmer formula in terms of the frequency of light.

Explanation

ln `(1)/(lambda)=R[(1)/(2^(2))-(1)/(n^(2))]`, putting `(1)/(lambda)=(v)/(c)`
`:.(v)/(c)=R[(1)/(2^(2))-(1)/(n^(2))]`
`:.v=Rc[(1)/(2^(2))-(1)/(n^(2))]`
which is the formula for the frequency of the Balmer series.