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+// Example 2.10
+// Calculation of Cut off wavelength
+// Page no 482
+
+clc;
+clear;
+close;
+
+// Given data
+V=2.403;              // Normalized frequency
+delta=0.25;           // Refractive index of core
+n1=1.46;              // Relative refractive index
+a=4.5*10^-6;          // Radius of core
+
+// Cut off wavelenth
+lambda=(2*%pi*a*n1*(sqrt(2*delta)))/V;       
+
+//Display result on command window
+printf("\n Cut off wavelenth(nm) = %0.0f  ",lambda*10^8);
+
+// The answers vary due to round off error