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+// Example 2.2:Acceptance Angle
+clc;
+clear;
+close;
+n1=1.53;//Waveguide Refractive Index
+n2=1.48;//Cladding Refractive Index
+no=1;// for air
+Oa= asind((sqrt(n1^2 - n2^2))/no);//Acceptance Angle
+Oc= asind(n2/n1);// Critical Angle
+disp(Oa,"Acceptanc Angle in Degree")
+disp(Oc,"Critical angle in degree")