an incidence angle of 
20 degrees, the transmission angle will be 43 degrees.</p>

<img vspace="5" hspace="5" src="images/example_tvsp_snells_law_02.png" style="width:560px;height:420px;" alt=""> 
        
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<h2>Critical Angle Reflection</h2>
    
<p>When the incidence angle exceeds</p>

<p>&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp<img src="images/example_tvsp_snells_law_eq_02.gif" style="width:140px;height:23px;" alt=""></p>

<p>the incident wave will be completely reflected. For the parameters 