Multiple scattering efficiency and optical extinction

In this investigation, scattering of laser light by polystyrene spheres has been examined. Our results demonstrate that certain multiple scattering da ta can be explained in terms of single scattering Mie theory. Multiple scat tering can be interpreted as a succession of independent, single scattering events. Using this interpretation, we have derived an expression that yiel ds the optimum particle size for maximum attenuation of laser light by part icles suspended in a medium. The size is smaller than that predicted by the Mie theory alone. Results of this research have wide general application f or all electromagnetic radiation and are particularly useful in determining optimum scattering materials and sizes for applications such as cavityless lasing, coherent back-scatter, and localization of light.