Theo mẫu nguyên tử Bo, trong nguyên tử hiđrô, chuyển động của êlectron quanh hạt

$\begin{array}{l} \text { Ta có }{r}_{\mathrm{n}}=\mathrm{n}^{2}{r}_{0} \\ \text { Mà }{F}_{\text {dien }}=\mathrm{F}_{\mathrm{ht}} \Leftrightarrow\left\{\begin{array}{l} \mathrm{k} \frac{\mathrm{q}_{0}^{2}}{\mathrm{r}_{0}^{2}}=\mathrm{m} \frac{\mathrm{v}^{2}}{\mathrm{r}_{0}} \\ \mathrm{k} \frac{\mathrm{q}_{0}^{2}}{\mathrm{r}_{4}^{2}}=\mathrm{m} \frac{\mathrm{v}_{4}^{2}}{\mathrm{r}_{4}} \end{array}\right. \end{array} \Leftrightarrow\left\{\begin{array}{l} \mathrm{k} \frac{\mathrm{q}_{0}^{2}}{\mathrm{r}_{0}^{2}}=\mathrm{m} \frac{\mathrm{v}^{2}}{\mathrm{r}_{0}} \\ \mathrm{k} \frac{\mathrm{q}_{0}^{2}}{256{r}_{0}^{2}}=\mathrm{m} \frac{\mathrm{v}_{4}^{2}}{16{r}_{0}} \end{array} \Leftrightarrow 256=\frac{16{v}^{2}}{\mathrm{v}_{4}^{2}} \Rightarrow{v}_{4}=\frac{\mathrm{v}}{4} .\right..$