To the question of the approximate method of the decision problems of multiple dispersion. The decision on the example of the ideal wave guide

In work on the example of the elementary liquid layer with flat borders the general rather simple approximate algorithm of calculation of the field formed by dispersion of primary field radiated by a third-party source on inclusion and dispersion on inclusion of a secondary field after its single reflection from borders of a wave guide is offered. The secondary field is understood as the field of dispersion caused by falling on inclusion of primary field. The task is considered for inclusion in the form of any spherically a symmetric body, however this assumption is easily generalized on any inclusion. The solution of this task was possible thanks to the algorithm of stay of total amplitude of dispersion received earlier by the author when falling on inclusion of a wave of a difficult form. The algorithm can be used in layered and non-uniform wave guides on condition of uniformity of the layer containing inclusion. The problem is easily solved and when the radiator and inclusion are combined.