\({v_n}\,\, = \,\,\frac{{z{e^2}}}{{2{ \in _0}nh}}\) હોય છે.
તેથી અહીં આપેલ હાઇડ્રોજન જેવા પરમાણુ માટે,
\(\,\,{{\text{v}}_{\text{n}}}\,\, \propto \,\,\frac{{\text{1}}}{{\text{n}}}\,\) (\({\text{z}}\,\, = \)અચળ)
\(\therefore\) \(\frac{{{v_5}}}{{v_2}} = \frac{{2}}{{5}} \)
\(\therefore\) \({v_5}\,\, = \,\,\frac{2}{5}\,\,{v_2}\,\, = \,\,\frac{2}{5}\,\,v\)