Abstract

The general equations of the path of a ray of light passing through the terrestrial atmosphere are outlined. The path of the ray tangent to the earth’s surface is calculated for the U. S. Standard Atmosphere. From this is prepared a table of horizon dip, horizon distance, and refraction for altitudes from sea level to 100,000 feet.

© 1938 Optical Society of America

The Brightness of the Twilight Sky and the Density and Temperature of the Atmosphere

E. O. Hulburt
J. Opt. Soc. Am. 28(7) 227-236 (1938)

Light Signals Sent Around a Closed Path

Herbert E. Ives
J. Opt. Soc. Am. 28(8) 296-299 (1938)

On the Calculation of Absorption Coefficients of Daylight in Natural Waters

R. T. Young
J. Opt. Soc. Am. 28(4) 95-99 (1938)

Optical Glass at the National Bureau of Standards*†

A. N. Finn
J. Opt. Soc. Am. 28(1) 13-17 (1938)

Calibration Wave-Lengths for Infra-Red Spectrometers

P. E. Shearin and E. K. Plyler
J. Opt. Soc. Am. 28(3) 61-62 (1938)