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//Example 25.4
n1=1.49;//Index of refraction for polystyrene, See Table 25.1
n2=1;//Index of refraction for air,
theta_c=asind(n2/n1);//Critical angle (deg)
printf('Critical angle = %0.1f deg',theta_c)
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest
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