Abstract
It is shown that previous applications of Onsager's theory to dielectric dispersion have contained an incorrect assumption about the behaviour of the reaction field when the applied field is varying. An equation for the complex dielectric constant is derived, using Onsager's model and taking proper account of the reaction field. An approximate method of solving the equation is developed and it is shown that the equation approximates closely to the simple Debye equation - ∞ = (0 - ∞)/(1 + jωτ) the microscopic and macroscopic relaxation times being almost identical.
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