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//Example No.3.3.
//Page No. 99.
//To find critical angle.
clc;clear;
n1 = 1.6;//Refractive index of core.
n2 = 1.49;// Refractive index of cladding.
Qc = asind((n2)/(n1));//Critical angle.
printf("\nThe critical angle of the fibre is %.2f degree",Qc);
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