Chapter 39, Problem 39.52P

(a)

To determine

The temperature when the ratio $\frac{n_2}{n_1}$ is equal to ${10}^{-12}$.

(b)

To determine

The temperature when the ratio $\frac{n_2}{n_1}$ is equal to ${10}^{-8}$.

(c)

To determine

The temperature when the ratio $\frac{n_2}{n_1}$ is equal to ${10}^{-4}$.

(d)

To determine

Why Balmer absorption lines are relatively weak in stars with low atmospheric temperatures but strong in stars with higher atmospheric temperature.