Abstract

Optical transmission has been measured in fogs for wavelengths from 1–11 μ. The results, together with the data of Arnulf, Bricard, Curé, and Véret, are analyzed under the assumption that particle sizes in natural aerosols follow the distribution law proposed by Junge: n(r)=Crp, where n(r)dr is the number of particles per cm3 with radii between r and r+dr, and C and p are some constants. The dependence of transmission on wavelength in fogs is of several forms, yet the theory accounts satisfactorily for each of them. Particle size measurements, when made, were in accord with the distribution law, and the values of p so obtained agree with the values inferred from optical transmission measurements.

© 1960 Optical Society of America

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