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//Example number 7.1, Page number 146
clc;clear;
close;
//Variable declaration
epsilonr=3.75; //relative dielectric constant
T=27; //temperature(C)
gama=1/3; //internal field constant
rho=2050; //density(kg/m**3)
Ma=32; //atomic weight(amu)
Na=6.022*10**23; //avagadro number
epsilon0=8.85*10**-12;
//Calculation
x=(epsilonr-1)/(epsilonr+2);
alpha_e=x*Ma*3*epsilon0/(rho*Na); //electronic polarisability(Fm**2)
//Result
printf("electronic polarisability is %.3e Fm^2",alpha_e)
//answer varies due to rounding off errors
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