ABSTRACT
The function |A| was dened by solving a direct scattering problem by BIE. Note that the angle between normals to arbitrary pair of points over any internal part Sin is less than pi/2. The only case, when a limiting value pi/2 is reached, is related to the points of intersection between the circles. Therefore, as mentioned above, only points of single specular (mirror) reection exist in the region Sin, for arbitrary direction of incidence, and multiple ray re›reections are impossible. It is clear from Fig. 7.5, when passing over the segment 0 ≤ θ < 2pi, that there are both intervals with slow variance of the amplitude |A(θ|) and intervals with high oscillations of this function. Approximate values of θ1 and θ2 are just chosen as points of jump from slow to high oscillations.
