37)
where ce is a constant characteristic of the dielectric and is known as the
electric susceptibility of the dielectric medium It is possible to relate ce to the molecular properties of the substance,
but we shall not pursue that here The question is: how does the polarised dielectric modify the original
external field inside it Let us consider, for simplicity, a rectangular
dielectric slab placed in a uniform external field E0 parallel to two of its
faces