Polarization and Interatomic Forces

The function (3.2) is shown as a function of y, which is proportional to the external field, in Fig. XXII-6. We see from the figure that at low fields the mean dipole moment is proportional to the field, but at high 

If the part of the polarizability resulting from the electronic distortion is ao, we then have 

If we measure the dielectric constant as a function of temperature, then, it should be a linear function of 1 /T and from the constants of the curve we can find both the electronic polarizability ao and the dipole moment 

1 See P. Debye, Polare Molekeln, Hirzel, 1929, for further discussion of dielectric constants. 

It is in this way that the dipole moments of a great many molecules have been determined. 

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