Chapter 2.1, Problem 2.1E

Determine the energy of the transition from $n_h=3$ to $n_I=2$ for the hydrogen atom, in both joules and
${\text{cm}}^{-1}$ (a common unit in spectroscopy, often used as an energy unit, since $\bar{v}$ is proportional to E). Thistransition results in a red line in the visible emission spectrum of hydrogen. (Solutions to the exercisesare given in Appendix Ag.)