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+//To find length of the medium
+//Example no 1.9
+//Page no. 30
+
+clc;
+clear all;
+bandwidth=100*10^9; //Bandwidth of optical signal
+w=2*%pi*bandwidth; //Bandwidth of optical signal in rad/s
+T=3.14*10^(-12); //Delay between minimum and maximum frequency component
+beta2=10*(10^(-12))^2/10^3; //Group velocity dispersion parameter in s^2/km
+L=T/(beta2*w); //Length of the medium
+
+// Displaying the result in command window
+printf('\n Length of the medium = %0.0f m',L);
+