\(=6.6 \times 10^{-34} \times 3 \times 10^8\left(\frac{1}{500 \times 10^{-9}}-\frac{1}{600 \times 10^{-9}}\right)\)
\(=6.6 \times 10^{-20}\,J\)
\(=\frac{6.6 \times 10^{-20}}{1.6 \times 10^{-19}} eV =4.125 \times 10^{-1}\,eV\)
\(=4125 \times 10^{-4}\,eV\)
[Rhc=13.6 eV, $\mathrm{hc}=1242 \mathrm{eV} \mathrm{nm}, \mathrm{h}=6.6 \times 10^{-34} \mathrm{J-s}$ અને હાઈડ્રોજન પરમાણુનું દળ $\sim 1.6 \times 10^{-27} \mathrm{~kg}$ લો.]