Report on the Transmission of Light by Fog
[Technical Report, Formal Report]
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
The report describes new experiments in which the transmission of infrared light by 0.244 km of foggy atmosphere was measured in the infrared spectrum from 1 to 12u. Transmission curves obtained with a residual ray apparatus employing quarts plates, and with an infrared spectrometer, are non-selective with wave-length and show that no regions of high transparency exist in fog out to wave-lengths at which the clear atmosphere becomes highly absorbing. The results of the experiments are in complete agreement with previous investigations of the transmission of light by natural fog and with the theory of scattering by large particles. It is now known that fog is not transparent to any usable wave-lengths of infrared light.