MODEL, \[\frac{1}{\lambda }=\frac{m{{e}^{4}}}{{{\varepsilon }_{0}}^{2}{{h}^{3}}C}\left( \frac{1}{{{N}_{1}}^{2}}-\frac{1}{{{n}_{2}}^{2}} \right)\] Where \[\lambda \]=wavelength, \[{{n}_{1}}\]and \[{{n}_{2}}\]are principal quantum NUMBERS. \[\therefore \left[ \frac{m{{e}^{4}}}{{{\varepsilon }_{0}}^{2}{{h}^{3}}c} \right]=[{{L}^{-1}}]=[{{M}^{0}}{{L}^{-1}}{{T}^{0}}]\]