Clausius–Mosotti relation makes relation between microscopic and macroscopic quantities of polarization. A dielectric material can be polarized by applying an external field on it. Dipole moment per unit volume of material is called polarization. The dipole moment ‘*p*’ is equal to the product of one of the charges and separation between the opposite charges of atoms or molecules. This dipole moment is proportional to the local electric field, *E*_{loc}, so that:

*p* = *αE*_{loc} _____ (6.15)

where ‘*α*’ is the electrical polarizability. If there are ‘*n*’ atoms per unit volume of the dielectric, then polarization ‘*P*’ is:

*P* = *np* = *nαE*_{loc} _____ (6.16)

Substituting the equation for local electric field, *E*_{loc} = *E* + *P**/*3*∈*_{0} in the above ...

Start Free Trial

No credit card required