For emission line of atomic hydrogen from n_{i} = 8 to n_{f} = the plot of wave number ($\vec{v}$) against $\left({1\over n^2}\right)$ will be (The Rydberg constant, R_{H} is in wave number unit).

(1) Linear with slope - R_{H }

(2) Linear with intercept - R_{H }

(3) Non linear

(4) Linear with sslope R_{H}