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// Example 2.6.1
clc;
clear;
NA = 0.45 //Numerical aperture
betaB = 45 // Skew ray change direction by 90 degree at each reflection
Meridional_theta = asind(NA); //computing acceptacne angle for meridoinal ray
Skew_theta = asind(NA/cosd(betaB)); //computing acceptacne angle for skew ray
printf("\nAcceptacne angle for Meridoinal ray is %.2f degree.\nAcceptance angle for Skew ray %.1f degree.",Meridional_theta,Skew_theta);
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