Accession Number : AD0261747

Title :   THEORETICAL INVESTIGATIONS ON THE LIGHT SCATTERING OF SPHERES. XIII. THE WAVE LENGTH EXPONENT OF DIFFERENTIAL TURBIDITY SPECTRA

Corporate Author : WAYNE STATE UNIV DETROIT MICH

Personal Author(s) : HELLER,WILFRIED ; BHATNAGAR,HARI L.

Report Date : 31 JUL 1961

Pagination or Media Count : 1

Abstract : The exact theory of the wave length exponent of the turbidity is developed for Rayleigh scattering and Debye-scattering and, particularly for Mie-scattering by non-absorbing spheres. The basic exponent n is computed from Mie-turbidity data, reported previously. The actual exponent to be expected in a given dispersed system, n sub o, is found to depend on three additional factors: (1) the rate of change of the turbidity with the relative refractive index of the spheres; (2) the dispersion of the relative refractive index of the spheres; and (3) the refractive index of the medium. The advantages and limitations of an application of the wave length exponent to particle size determinations are discussed and labor saving approximating n(alpha)-relations, suitable for first approximation results on particle si e, are given. The effect of heterodispersion upon the wave length exponent is briefly discussed. (Author)

Descriptors :   *COLLOIDS, *LIGHT, LIGHT TRANSMISSION, MEASUREMENT, MOLECULES, PARTICLES, REFRACTION, REFRACTIVE INDEX, SCATTERING, SPHERES, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE