Energia atomu wodoru (model Bohra)

$$E_n=-<!--\; -\; -->\frac{m_e<!--\; InvisibleTimes\; -->e^4}{8<!--\; InvisibleTimes\; -->{\mathrm{\epsilon <!--\; \epsilon \; -->}}_0^2<!--\; InvisibleTimes\; -->h^2}·<!--\; ·\; -->\frac{1}{n^2}$$