Extinction By Aerosol Clouds Of Nonspherical Particles At Arbitrary Wavelengths

Janon F. Embury

doi:10.1117/12.932693

30 December 1981 Extinction By Aerosol Clouds Of Nonspherical Particles At Arbitrary Wavelengths

Janon F. Embury

Proceedings Volume 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance; (1981) https://doi.org/10.1117/12.932693
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

Extinction by a cloud consisting of many aerosol particles has been found to fall into two distinct wavelength regions which are adequately described by the geometric optics theory and the Rayleigh theory. Because the cloud consists of many different particles, the narrow extinction resonance structure of individual particles is lost and extinction is governed by shape and size as predicted by geometric optics. At longer wavelengths particles are in the Rayleigh region and extinction for a large variety of particles is predicted by the Rayleigh ellipsoidal theory. The transition region lying between the applicability of these two simple theories occupies only about one wavelength decade.

Citation Download Citation

Janon F. Embury "Extinction By Aerosol Clouds Of Nonspherical Particles At Arbitrary Wavelengths", Proc. SPIE 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance, (30 December 1981); https://doi.org/10.1117/12.932693

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