DTIC ADA062667: Effects of Particulate Complex Refractive pdf

DTIC ADA062667: Effects of Particulate Complex Refractive

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A comprehensive sensitivity study has been made, using Mie theory, to determine the effect of realistic variations in values of real and imaginary parts of the complex index of refraction on volume extinction and absorption coefficients for a wide range of lognormal particle size distributions (defined by geometric mean radius r sub g and geometric standard deviation sigma sub g). Wavelengths lambda from visible (0.55 micrometers) through middle-infrared (10.6 micrometers) were considered. Extinction is independent of complex index to within 20 percent for the majority of realistic particle size distributions, providing lambda or = 2 micrometers. However, changes in extinction by up to an order of magnitude are caused by realistic variations in refractive indexes for 2 or = lambda or = 10.6 micrometers, with real index being more important in affecting extinction than imaginary index

• Creator/s: Defense Technical Information Center
• Date: 9/1/1978
• Year: 1978
• Book Topics/Themes: DTIC Archive, Jennings, S G, ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES LAB, *ATMOSPHERIC SCATTERING, *INTERMEDIATE INFRARED RADIATION, *RADIATION ATTENUATION, *REFRACTIVE INDEX, COMPLEX NUMBERS, DISTRIBUTION FUNCTIONS, EXTINCTION, MIE SCATTERING, PARTICLE SIZE, PARTICULATES, STATISTICAL ANALYSIS

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