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+
+//Optoelectronics and Fiber Optics Communication by C.R. Sarkar and D.C. Sarkar
+//Example 2.1
+//OS = Windows 7
+//Scilab version 5.5.2
+
+clc;
+clear;
+
+//given
+lamda=85*10^-8;//wavelength of multimode fiber m
+d=70e-6;//core diameter of the multimode fiber in m
+n1=1.46;//refractive index of the fiber
+delta=0.015;//relative refractive index difference
+a=d/2;//radius=d/2 of core in m
+n2=n1-(delta*n1);//refractive index of cladding
+c=2*%pi*a/lamda;//constant part of the V-Number formula
+V=c*((n1^2-n2^2))^0.5;// V-number
+M=V^2/2;//total number of guided modes in the stepindex fiber
+mprintf("\n Refractive Index of the cladding is=%.2f ",n2);
+mprintf("\n Normalized frequency V-number of the fiber is =%.2f ",V);
+mprintf("\n Total number of guided modes in the fiber is= %.0f ",M);
+//The answers vary due to rounding