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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 8.4
+//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
+a=100e-6;//Core radius in m
+Lambda0=900e-9;//Vacuum wavelength in m
+
+V=2*%pi*(a/Lambda0)*sqrt((n1^2)-(n2^2));//Dimensionless normalized film thickness
+mprintf("\n V = %.1f",V);
+
+N=(V^2)/2;//Number of modes of propagation
+mprintf("\n N = %d",N);