The Transparency of the Air Between 1100 and 1300A

Abstract

It has long been predicted that the air possesses considerable transparency for light in the region between 1100 and 1300A. This paper deals with a very simple method of demonstrating this transparency by the use of a thermoluminescent screen. Secondary products of the investigation are first, a study of the selective sensitivity of the screen just mentioned; second, a determination of the nature of the so-called Entladungsstrahlen; and third, the description of a simple method of testing the transparency of lithium fluoride crystals.