Absorption, reflection, and dispersion constants of quartz

Abstract

cent, if we admit an error of 2 parts in 1000. This property of great transparency in one spectral region, and great opacity in a closely adjoining region, requires the employment of thick samples of quartz in order to determine accurately the transmission in the intervening region. The whole investigation requires a special procedure, which one would not ordinarily undertake. The data obtained in the present investigation are therefore published with the hope that they may be of use to others. A preliminary 2 examination of several samples of quartz was recently published. One sample consisted of two plates, each 6.5 mm in thickness. Inadvertently, as published, the thickness is stated to be 13 mm, with no mention that it represented two