Author: W. W. Coblentz

Publisher: Forgotten Books

Published: 2016-09-30

Total Pages: 42

ISBN-13: 9781333793678

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Excerpt from Selective Radiation From Various Substances, IV The luminous efficiency of vacuum tube radiation (air,10 nitrogen, carbon dioxide, helium, etc.) is of the order of 15 to 20 per cent, or perhaps even much lower, owing to the great amount of infra-red radiations emitted. In marked contrast with these gases is neon, in which the infra-red is almost entirely absent, so that its luminous efficiency is of the order of 80 to 90 per cent. The color of this light is a rich crimson. In conclusion, it may be noticed that the spectrum of neon is composed of numerous fine lines, more than 60 of which lie between the red and yellow helium lines (o. And With a larger dispersion the shape of the curve will necessarily change until, when final resolution is attained, each spectral line will give a more symmetrical energy curve, as observed (fig. 4) at for helium. There is sufficient reason for believing that the emission lines in neon are just as numerous at to as they are in the visible spectrum, so that whatever the dispersion, the same energy distribution will obtain as here observed, viz, that the strongest lines occur in the region of to of the visible spectrum. In this respect, as already stated, neon is unique. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Download or read book Selective Radiation From Various Substances, IV (Classic Reprint) written by W. W. Coblentz and published by Forgotten Books. This book was released on 2016-09-30 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Selective Radiation From Various Substances, IV The luminous efficiency of vacuum tube radiation (air,10 nitrogen, carbon dioxide, helium, etc.) is of the order of 15 to 20 per cent, or perhaps even much lower, owing to the great amount of infra-red radiations emitted. In marked contrast with these gases is neon, in which the infra-red is almost entirely absent, so that its luminous efficiency is of the order of 80 to 90 per cent. The color of this light is a rich crimson. In conclusion, it may be noticed that the spectrum of neon is composed of numerous fine lines, more than 60 of which lie between the red and yellow helium lines (o. And With a larger dispersion the shape of the curve will necessarily change until, when final resolution is attained, each spectral line will give a more symmetrical energy curve, as observed (fig. 4) at for helium. There is sufficient reason for believing that the emission lines in neon are just as numerous at to as they are in the visible spectrum, so that whatever the dispersion, the same energy distribution will obtain as here observed, viz, that the strongest lines occur in the region of to of the visible spectrum. In this respect, as already stated, neon is unique. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.