ABSTRACT
Apart from the extended medium propagation problem considered in the previous chapter, the scattering models that have been studied so far have only involved
single
scattering by particles or phase variations. In the previous chapter, the weak scattering treatment was also effectively a single scattering approximation, but in the saturated regime
multiple
scattering by a sequence of inhomogeneities had to be taken into account [1]. Multiple scattering is a feature of light propagation through dense particle suspensions such as cloud and fog, encoding properties of the medium while at the same time limiting the transfer of information through it [2,3]. It is also a problem that has received a great deal of attention from the solid-state physics community interested in electron scattering in disordered media [4]. The subject has been studied for many years, but owing to the intractable nature of the calculations, attention has focused mainly on evaluating the most basic characteristic of the scattered (or transmitted) radiation, namely, its mean intensity. With the development of powerful computers, however, there has been renewed interest in multiple scattering phenomena and a large number of new investigations have been carried out (for a list of references see [5] for example).
