Scattering by Nonspherical Particulates.
Abstract
Mie theory, which treats only spheres, is usually employed to predict the scattering of light by particles whose size is of the order of the wavelength. The effects due to particle shape--a cylinder (4:1), prolate spheroids (4:1 and 2:1), a sphere, oblate spheroids (2:1 and 4:1), and a disk (4:1)--are investigated for 4 sizes spanning the resonant region. All particles have the same index of refraction, M= 1.61 - 10.004i, representative of silicates. microwave analog and theoretical methods are used to derive the scattered intensity and degree of polarization as a function of scattering angle along with the extinction. All results refer to an ensemble or a cloud of identical particles because averages have been taken over random particle-orientations. The degree of polarization, backscatter, and the radiation pressure cross-section are most sensitive to particle shape, implying the use of Mie theory may be inappropriate for many applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1980
- Accession Number
- ADA099555
Entities
People
- Donald W. Schuerman
Organizations
- State University of New York at Albany