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+//Example number 7.3, Page number 147
+
+clc;clear;
+close;
+
+//Variable declaration
+epsilonr=1.0000684; //dielectric constant
+N=2.7*10**25; //number of atoms
+epsilon0=8.85*10**-12;
+//Calculation
+alpha_e=epsilon0*(epsilonr-1)/N; //polarisability(Fm**2)
+//Result
+printf("polarisability is %.3e Fm^2",alpha_e)
+//answer varies due to rounding off errors