1 (scattering) • Scattering is a general physical process where some forms of radiation, such as light, sound, or moving particles, are forced to deviate from a straight trajectory by one or more localized non-uniformities in the medium through which they pass. ‘
2 • Major forms of elastic light scattering (involving negligible energy transfer) are Rayleigh scattering and Mie scattering . ⇒ Rayleigh scattering (small particle compared to λ of light) ⇒ Mie scattering (spherical particles about the same size as λ of light) • Inelastic scattering includes Brillouin scattering , Raman scattering , inelastic X-ray scattering and Compton scattering. ⇒ Compton scattering is an inelastic scattering of a photon by a free charged particle, usually an electron. ⇒ Tyndall scattering is similar to Mie scattering: without the restriction to spherical geometry of the particles. Particularly applicable to colloidal mixtures and suspensions.