The wave number of the first emission line in the Balmer series of H-Spectrum is: ($R =$ Rydberg constant): (1) $\frac{5}{36}R$ (2) $\frac{9}{400}R$ (3) $\frac{7}{6}R$ (4) $\frac{3}{4}R$
The wave number of the first emission line in the Balmer series of H-Spectrum is: ($R =$ Rydberg constant):\\
(1) $\frac{5}{36}R$\\
(2) $\frac{9}{400}R$\\
(3) $\frac{7}{6}R$\\
(4) $\frac{3}{4}R$