Relationship of particle size to light scattering

A previously obtained empirical relationship describing light scattering as a function of particle concentration and size was examined in view of clas sical light scattering theory. Although the particle size range used to dev elop the equation covered both a region where theory predicts that haze int ensity should be a function of r(4)/lambda(2) (where wavelength, lambda, is approximately equal to particle radius, r) and one where haze intensity sh ould be a function of r(2) (where r > lambda), the empirically derived equa tion predicted that haze intensity was proportional to particle radius squa red. This may have resulted from a dependence on either particle surface ar ea or cross-sectional area.