For a method which include a random medium with tough barriers, the governing (Bethe-Salpeter) equation for boundary-value shipping difficulties will be written in a sort such that the medium and the limits are treatedon an equivalent footing. this allows numerous expressions for the answer to be bought by way of interchanging the jobs of the medium and the bounds, therefore permitting the best one to be chosen in line with the particular state of affairs and the knowledge required. This e-book provides a unified concept in accordance with the Bethe-Salpeter equation with specific recognition being paid to: boundary-value difficulties of shipping, layer difficulties, a hard and fast scatterer imbedded in a bounded random medium, building of an optical scattering matrix for a whole approach, and optical wave propagation in a turbulent medium. The final subject is taken care of by way of first second equations mixed with the cluster growth and, moment, the two-scale strategy in keeping with the Lagrange variational precept.

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