A diffusion model of the transport of radiation from a point source in the lower atmosphere

Using an adaptation of neutron diffusion theory, with some concepts from potential theory, a simple method is developed for determining the effects of multiple scattering and boundary reflection upon the flux of radiation received from a point source in a non-absorbing foggy atmosphere. The method, which is supported by experiments at reduced scale, shows that the potentially large enhancement of flux by multiple scattering is offset by a marked dependence upon absorption at the boundaries.