■解答
① \(\displaystyle\frac{c}{n_1}\) ② \(\displaystyle\frac{c}{f}\) ③ \(\displaystyle\frac{\lambda}{n_1}\)
④ \(\displaystyle\frac{\lambda_1}{\lambda_2}\) ⑤ \(\displaystyle\frac{n_2}{n_1}\) ⑥ \(\displaystyle\frac{n_2}{n_1}\)
⑦ \(\theta_1-\theta_2+\phi_1-\phi_2\) ⑧ \(\theta_1+\phi_1-a\) ⑨ \((n-1)a\)
⑩ \(a\displaystyle\left| \frac{\Delta n}{\Delta \lambda}\right| \) ⑪ ア
