Static and dynamic multiple scattering of light

An overview over recent progress in static and dynamic multiple light scattering is given. Interferences between time reversed multiple scattering paths result in a coherent enhancement of the static backscattering intensity, illustrated by various experiments. The angular shape, I(θ), of the backscattering cone is discussed in terms of the path length distribution. The time auto-correlation function C(t) of the fluctuating light intensity multiply scattered from liquid colloidal suspensions can be interpreted similarly. Our data corroborate the analogy between I(θ) and C(t). From this it appears possible to extract information on the single particle dynamics even under conditions of strong multiple scattering.