The Spectroscopy Of The Extreme Ultra Violet Classic Reprint

Download or read book The Spectroscopy of the Extreme Ultra-Violet (Classic Reprint) written by Theodore Lyman and published by Forgotten Books. This book was released on 2018-03-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Spectroscopy of the Extreme Ultra-Violet It is to this region that the greater part of this work is dedicated. In looking back over the foregoing paragraphs, it is at once obvious that the factors which have controlled our knowledge of the ultra-violet end of the spectrum are, first, the absorption of solids; second, the means by which the refracted light was detected; third, the character of the source, and fourth, the absorption of the constituents of the air. By way of intro duction to the Schumann region, therefore, it will be well to pay special attention to the behaviour of these agents in the ultra-violet. The classic works on spectroscopy require at the outset a detailed account of apparatus, but in the limited scope of the present volume it will be necessary to confine ourselves to those instruments which are not described elsewhere. Thus, as prism and grating spectroscopes are fully treated in many places as far as the ordinary ultra-violet is concerned notably in Kayser's Handbuch and Baly's Spectroscopy, it will not be necessary to mention them until the Schumann region is reached. On the other hand, since instruments for the comparison of the energy given by two sources of light in the ultra-violet are not quite so familiar to the scientific reader, and since the principles involved in them often permit their use in the extreme ultra-violet, we shall begin by some de scription of them. 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.