E=hv\mathrm{E}=\mathrm{hv}E=hv
h=6.626×1034Js\text{h}=6.626\times 10^{34}\mathrm{Js}h=6.626×1034Js
Eαv\mathrm{E}\alpha \mathrm{v}Eαv
h=6.626×10−34Js\text{h}=6.626\times 10^{-34}\mathrm{Js}h=6.626×10−34Js