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r_{\bot} \equiv \left( \frac {E_{0r}}{E_{0i}} \right) =

\frac {\frac {n_i}{\mu_i} Cos \theta_i - \frac {n_t}{\mu_t} Cos \theta_t}

{\frac {n_i}{\mu_i} Cos \theta_i + \frac {n_t}{\mu_t} Cos \theta_t}

[/tex]

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[tex]

r_{\bot} \equiv \left( \frac {E_{0r}}{E_{0i}} \right)_{\bot} =

\frac {\frac {n_i}{\mu_i} Cos \theta_i - \frac {n_t}{\mu_t} Cos \theta_t}

{\frac {n_i}{\mu_i} Cos \theta_i + \frac {n_t}{\mu_t} Cos \theta_t}

[/tex]

transmission coefficient:

[tex]

t_{\bot} \equiv \left( \frac {E_{0t}}{E_{0i}} \right)_{\bot} =

\frac {2 \frac {n_i}{\mu_i} Cos \theta_i}

{\frac {n_i}{\mu_i} Cos \theta_i + \frac {n_t}{\mu_t} Cos \theta_t}

[/tex]

I copy these from Hecht-Optics page 114.

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