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//Example number 12.8, Page number 265
clc;clear;
close;
//Variable declaration
n1=1.55; //Core refractive index
n2=1.6; //Cladding refractive index
theta1=60*%pi/180; //incident angle(degrees)
//Calculation
x=n1*sin(theta1)/n2;
theta2=asin(x); //refraction angle(radian)
theta2=theta2*180/%pi; //refraction angle(degrees)
//Result
printf("refraction angle is %.2f degree",theta2)
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