Rayleigh-Gans-Debye equation

Equations 8.27 and 8.28 are not satisfied if al k = 0.3 and n - 1 = 0.3, but these values lead to a value of 0.09 for the left-hand side in Equation 8.34, whieh is satisfied. Thus the Rayleigh-Gans-Debye result can be extended to systems not covered by Rayleigh scattering alone. Further, for n very close to one, much larger values of a, the length scale characterizing the dispersed phase, can be tolerated. 

In Equation 14.22 the subscripts RDG and R denote Rayleigh-Debye-Gans and Rayleigh. In Equation 14.23b q is the scattering wave vector to be discussed below. 

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 ... 

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