The Rayleigh-Gans region D X

The Rayleigh-Gans equation for the angular dependence of the intensity of the scattered light is given for spherical particles of low refractive index by the equation [45]  

the two terms in the final brackets refer respectively to the intensities of the vertically and horizontally polarized components, /q is the intensity of the incident beam, D is particle diameter and  

Equation (10.17) reduces to equation (10.14) when the middle term is equal to one. The scattering pattern is however modified by this term, thus 

A graphical solution for all maxima and minima has been determined by Pierce and Maron [93] who, together with Elder [94,95] extended equations (10.21) and (10.22) beyond the Rayleigh-Gans region, (ffj - 1 0) to 1.00 /M 1.55, deriving the following formulae  

These equations give the positions of the first intensity minimum and maximum respectively. 

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