\frac{E_{r 0}^{⊥}}{E_{i 0}^{⊥}} = \frac{\cos α - \frac{n_{2}}{n_{1}} \cos γ}{\cos α + \frac{n_{2}}{n_{1}} \cos γ} = \frac{\cos α - \frac{\sin α}{\sin γ} \cos γ}{\cos α + \frac{\sin α}{\sin γ} \cos γ}

${\frac{E_{r0}^\perp}{E_{i0}^\perp} = \frac{\cos \alpha -\frac{n_2}{n_1} \cos \gamma}{\cos \alpha + \frac{n_2}{n_1} \cos \gamma} = \frac{\cos \alpha - \frac{\sin \alpha}{\sin \gamma} \cos \gamma }{\cos\alpha + \frac{\sin \alpha }{\sin \gamma} \cos \gamma}}$

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