Structure of the Atom

r_n = \frac{n^2 h^2 \varepsilon_0}{\pi m Z e^2}

v_n = \frac{Z e^2}{2 \varepsilon_0 n h}

E_n = -\frac{13.6 Z^2}{n^2} \text{eV}

\nu = R c Z^2 \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right)

\frac{1}{\lambda} = R Z^2 \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right)