\(\therefore\) મહતમ તરંગ લંબાઈ માટે
\({\lambda _{max}} = \,\,\frac{{12400}}{{{E_{4 \to 3}}}}\,\, = \,\,\frac{{12400}}{{0.66}}\,\, = \,\,18787.\,8\,\,\mathop A\limits^ \circ \)
\(\therefore\) ન્યૂનતમ તરંગ લંબાઈ માટે
\({\lambda _{min}} = \,\,\frac{{hc}}{{eE}}\,\, = \,\,\frac{{12400}}{{{E_{4 \to 1}}}}\,\, = \,\,\frac{{12400}}{{12.75}}\,\,\, \approx \,\,973\,\,\mathop A\limits^ \circ \)
$\text { ( } h =6.62 \times 10^{-34}\,Js)$ આવેલું છે.