FIG. 2.

(a) Form factors for the fluid sphere model F₁, the spherical shell model F₂, and the Gaussian model F₃; F₄ and F₆ are form factors calculated from the Faran scattering theory¹³ for microspheres made of glass and fat, respectively. (b) Form factor for the rigid, immovable sphere F_r is plotted along with the fluid sphere model F₁ (solid lines) and that calculated for glass, polystyrene, and fat microspheres from the Faran scattering theory.¹³ These data include the effects of shear waves generated inside the particle. (c) Same as (b), except that the glass, polystyrene, and fat data are calculated from the theory of Morse and Ingard.⁹ These results do not include the effects of shear waves. (d) Form factors for collagen along and across the fibers. The results are computed using the Faran theory and the parameters are taken from the work of Cusak and Miller.¹⁷ These results show that scattering from collagen spheres may be approximated by that of polystyrene.