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# Calculate the wavelength of the spectral line in Lyman series corresponding to n2=3?

##lambda=656"nm"##

The Rydberg expression is :

##1/lambda=R[1/n_1^(2)-1/n_2^(2)]##

##1/lambda=1.0973xx10^(7)[1/2^(2)-1/3^(2)]##

##1/lambda=0.1524xx10^7m^(-1)##

##lambda=6.56xx10^(-7)"m"= 656"nm"##