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+//Example 5.15, Page number 5.32
+
+clc;clear;close
+
+// variable declaration
+L=10 // in km
+n1=1.55 //unitless
+delta=0.026//unitless
+C=3*10**5
+
+// Calculations
+delta_T=(L*n1*delta)/C //unitless
+B_W=10/(2*delta_T) // Hz/km
+
+// Result
+printf("Total dispersion = %.1f ns",(delta_T/10**-9))
+printf("\nBandwidth length product = %.2f Hz-km",(B_W/10**5))
+
+// Answer given in the text book is wrong"