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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 8.5
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+n1=1.48;//Dimensionless refractive index of fiber core
+n2=1.46;//Dimensionless refractive index of fiber cladding
+n0=1;//Dimensionless refractive index of air
+
+Thetac=asind(n2/n1);//critical angle in degrees
+mprintf("\n Thetac = %.1f degrees",Thetac);//The answers vary due to round off error
+
+Delta=(n1-n2)/n1;
+mprintf("\n Delta = %.4f",Delta);//The answers vary due to round off error
+
+NA=n1*sqrt(2*Delta);//Dimensionless Numerical aperture of fiber
+mprintf("\n NA = %.3f",NA);//The answers vary due to round off error
+
+AlphaMax=asind(NA);//Fiber acceptance angle in degrees
+mprintf("\n AlphaMax = %.1f degrees",AlphaMax);//The answers vary due to round off error