The anomalous-diffraction approximation of Van de Hulst is used to derive
closed-form expressions for the absorption and extinction efficiencies of the
long absorbing cylinder at normal and oblique incidence. The predictions of
these expressions are compared with those of the exact theory for cylinders of
various sizes, refractive indices, degrees of absorption, and orientations. A
correction for the approximate solution at very oblique incidence is
© 1970 Optical Society of America
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