  In this paper it is explained the construction and utility of a didactic
exhibit about the effect of aerosol in atmosphere on electromagnetic wave
propagation. The exhibit is composed by a lamp simulating the Sun, a Plexiglas
case (the atmosphere), white or black panels (surface albedo), a combustion
chamber to supply aerosol inside the case and other equipments. There are
temperature and relative humidity of air sensors and 5 light sensors to measure
direct and scattered light. It is possible to measure the cooling effect of
aerosol inside the case and the increasing in scattered light.
