Rayleigh-Debye-Gans approximation

G. H. Meeten, Conservative dichroism in the Rayleigh-Gans-Debye approximation, J. Coll. Inter. Sci., 84,235 (1981). 

For small colloidal particles (a < 1 /mi), with spherically symmetric distribution of scattering material inside its volume, the field amplitude is given by the Rayleigh-Gans-Debye approximation [38]... 

Macromolecular solutions and colloidal suspensions show light dispersion phenomena, which is found to be essentially dependent on the molecular weight of the dispersing substance, according to the Rayleigh-Gans-Debye approximation (Striegel et al. 2009) ... 

If scattering from the medium is sufficiently weak, one is justified in applying the so-called Rayleigh-Gans-Debye approximation. This simply says that the field inside the scatterer may be approximated to... 

Al-Chalabi, S. A. M., Jones, A. R., Light Scattering by Irregular Particles in the Rayleigh-Gans-Debye Approximation, J. FAys. D, 1995,28, 1304-1308. 

Rayleigh-Debye-Gans (RDG) approximation, and its accuracy will be addressed below. For a solid sphere, equation (18.19) is readily evaluated. The result reads as follows ... 

T. L. Farias, M. G. Carvalho, U. 0. Koylii, and G. M. Faeth, Computational Evaluation of Approximate Rayleigh-Debye-Gans/Fractal Aggregate Theory for the Absorption and Scattering Properties of Soot, ASME Journal of Heat Transfer, 117, pp. 152-159,1995. 

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