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+//chapter 7
+//example 7.4
+//Calculate the dipole moment induced in each atom and atomic polarisability
+//page 188-189
+clear;
+clc;
+//given
+K=1.000134; // di-elecrtic constant of the neon gas at NTP
+E=90000; // in V/m (electric field)
+Eo=8.85E-12; // in C/N-m^2 (absolute premittivity)
+N_A=6.023E26; // in atoms/Kg-mole (Avogadro's number)
+V=22.4; // in m^3 (volume of gas at NTP
+//calculate
+n=N_A/V; // calculaton of density of atoms
+// Since P=n*p=(k-1)*Eo*E
+// therefore we have
+p=(K-1)*Eo*E/n; // calculation of dipole moment induced
+printf('\nThe dipole moment induced in each atom is \tp=%1.2E C-m',p);
+alpha=p/E; // calculation of atomic polarisability
+printf('\n\nThe atomic polarisability of neon is \t=%1.2E c-m^2/V',alpha);
+// NOTE: The answer of atomic polarisability is wrong due to printing error