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//Ex:2.15
clc;
clear;
close;
n1=1.50;// core refractive index
n2=1.45;// cladding refractive index
x_c=(asin(n2/n1))*180/%pi;// critical angle in degree
n_m=sqrt(n1^2-n2^2);// numerical aperture
x_a=(asin(n_m))*180/%pi;// acceptance angle in degree
n_c=(n_m)^2*100;// percentage of light
printf("critical angle=%f degree",x_c);
printf("\n acceptance angle=%f degree",x_a);
printf("\n numerical aperture=%f",n_m);
printf("\n percentage of light=%f%%",n_c);
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