这是一份ucl伦敦大学学院 PHAS0099作业代写的成功案
问题 1.
$$
\begin{aligned}
r_{n} &=n^{2}\left(\frac{h^{2} \varepsilon_{0}}{\pi m e^{2}}\right) \
&=n^{2} r_{1}
\end{aligned}
$$
or
$$
r_{n}=(0.53) n^{2} A^{0}
$$
This is the expression for the radius of $n$th orbit.
证明 .
For second orbit, $\mathrm{n}=2$,
$$
r_{2}=(0.53) \times(2)^{2}=2.12 \mathrm{~A}^{0} .
$$
PHAS0099 COURSE NOTES ：
\begin{aligned}
v_{r} &=\frac{E_{r}^{\prime}-E_{r}{ }^{\prime \prime}}{? c} \
&=\frac{?}{8 \pi^{2} I C}\left[J^{\prime}\left(J^{\prime}+1\right)-J^{\prime \prime}\left(J^{\prime \prime}+1\right)\right] \
&=B\left[J^{\prime}\left(J^{\prime}+1\right)-J^{\prime \prime}\left(J^{\prime \prime}+I\right)\right]
\end{aligned}