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+//Example 14.1
+//Program to determine the attenuation per kilometer for the fiber 
+//and estimate the accuracy of the result
+
+clear;
+clc ;
+close ;
+
+//Given data
+L1=2*10^3;          //metres - INITIAL LENGTH
+L2=2;               //metres - FINAL LENGTH
+V1=2.1;             //volts - INITIAL OUTPUT VOLTAGE
+V2=10.7;            //volts - FINAL OUTPUT VOLTAGE
+
+//Attenuation per Kilometer
+alpha_dB=10/(L1-L2)*log10(V2/V1);
+
+//Uncertainity in measured attenuation
+Uncertainity=0.2/(L1-L2);
+
+//Displaying the Results in Command Window
+printf("\n\n\t Attenuation is %0.1f dB/km.",alpha_dB*10^3);
+printf("\n\n\t Uncertainity in measured attenuation is +-%0.1f dB.",Uncertainity*10^3);
+\ No newline at end of file