The Transmission of Visible Light through Fog

Abstract

Measurements were made on the transmission of visible light through artificial fog which was produced by condensing low pressure steam in a chamber 300 cm long and about 25 cm square. Curves for several fog densities were obtained and they all indicated a definite maximum transmission at about 0.490μ. The relation between the transmission of light through fog and the fog density was found to be practically linear. The maxima obtained are not in agreement with the results of other investigators but a comparison of the particle sizes of the fogs used in this work with those of the fogs used by others leads to the conclusion that the shape of the transmission curve is dependent on the particular particle size or sizes of the fog on which the measurements are made.