$E\,\, = \,\,nhv$ અથવા $\frac{{nhc}}{\lambda }\,\,\,\{ \because \,n = 1\} $

$\therefore \,\,E\,\, = \,\,\frac{{hc}}{\lambda }\,$ અથવા 

$\,E\,\, = \,\,\frac{{1 \times 6.6 \times {{10}^{ - 34}}\,J \times 3 \times {{10}^8}\,m{s^{ - 1}}}}{{5.862 \times {{10}^{ - 16}}\,m}}\,\, = \,\,\frac{{6.6 \times 3}}{{5.862}} \times {10^{ - 10}}\,J\,\,\,\, = \,\,3.38 \times {10^{ - 10}}\,J$