Rydberg Equation Formula

Equation for calculate rydberg equation is,

$\frac{1}{\lambda }=R{Z}^{2 }\left[\frac{1}{{n_f}^2}-\frac{1}{{n_i}^2}\right]$

Where,
λ = Wavelength of the photon
nf = Principle quantum number of final state
ni = Principle quantum number of initial state
RH = Rydberg Constant (1.097x 10⁷ m^-1)
Z = Number of proton in the nucleus of the element