Error contour charts for the two-wave WKB approximation

Abstract

Error contour charts have been generated comparing scattered intensities calculated using the RGD and the single-wave and two-wave WKB approximations against Mie theory in the range of real refractive index from 1 to 1.5 and of size parameter from 0 to 20. It is demonstrated that the two-wave WKB method is superior to the others. Nonetheless its range of applicability is very limited, especially at scattering angles larger than .}