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Description of the frequency dependent model of the electronic contribution to polarisability and permittivity.

Optical Measurements.

The ionic contribution to polarisation and permittivity.

Derivation of the dipolar contribution to polarisation and permittivity (as an example of a relaxation mechanism). Saturation polarisation. Temperature and frequency dependence of the dipolar contribution to the permittivity.

Electronic contribution handout

Optical handout

Dipolar contribution handout

What you need to know
 
You need to be familiar with the physical basis of and details of the model used to explain the electronic contribution to permittivity. You should be aware of the basic functional form of the frequency dependent results and that the main features in this model appear in the UV region.

You should know how to relate the results of optical measurements to theory.

You should be aware of the source of the ionic contribution to polarisation and the location of the main features of this contribution - in the IR region.

You need to understand the key points of the derivation of the dipolar contribution to permittivity and be aware of the general features of this contribution as a function of frequency.

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