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+//Chapter-3,Example 3_16,Page 3-24
+clc()
+
+//Given Data:
+NA=0.16              //Numerical Aperture of Fibre
+n1=1.45              //R.I. of core
+d=90*10^-6           //Core diameter
+
+//Calculations:
+//NA=sqrt(n1^2-n2^2)
+n2=sqrt(n1^2-NA^2)    //R.I.of cladding
+printf('(a)Refractive Index of cladding of fibre is =%.3f \n \n',n2)
+
+theta0=asin(NA)*180/%pi    //Acceptance angle of fibre
+printf(' (b)Acceptance angle of Fibre is =%.2f degrees \n',theta0)