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+clc;
+clear all;
+delta = 0.012; // Relative refractive index
+NA = 0.22;// Numerical Aperture
+n1 = NA/(sqrt(2*delta)); //The refractive index of core
+n2 = n1*(1-delta); // The refractice index of cladding
+disp('',n1,'The refractive index of core is')
+disp('',n2,'The refractive index of cladding is')