\(\,\therefore \,\,\frac{{{E_2}}}{{{E_1}}}\,\, = \,\,\frac{{{\lambda _1}}}{{{\lambda _2}}}\,\, = \,\,\frac{{6000}}{{4000}}\,\, = \,\,1.5\)
\(\therefore \,\,{E_2}\, = \,\,\frac{{1.5\,\, \times \,\,3.32\,\, \times \,\,{{10}^{ - 19}}}}{{1.6\,\, \times \,\,{{10}^{ - 19}}}}\,\,\, = \,\,3.1\,\,eV\)