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clear
//
//
//
//Variable declaration
epsilonr=3.75 //relative dielectric constant
gama=1/3 //internal field constant
D=2050 //density(kg/m**3)
M=32 //atomic weight(amu)
Na=6.02*10**26 //avagadro number
epsilon0=8.85*10**-12
//Calculation
N=Na*D/M //number of atoms per m**3
x=(epsilonr-1)/(epsilonr+2)
alpha_e=x*3*epsilon0/N //electronic polarisability(F-m**2)
//Result
printf("\n electronic polarisability is %0.2f *10**-40 Fm**2",alpha_e*10**40)
printf("\n answer in the book varies due to rounding off errors")
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