The Influence of a Magnetic Field Upon the Spark Spectra of Iron and Titanium (Classic Reprint)

Download or read book The Influence of a Magnetic Field Upon the Spark Spectra of Iron and Titanium (Classic Reprint) written by Arthur S. King and published by . This book was released on 2015-08-05 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Influence of a Magnetic Field Upon the Spark Spectra of Iron and Titanium The investigation of which an account is given in the following pages was carried out during the year 1910 in the Pasadena laboratory of the Solar Observatory. The object was to obtain as complete data as possible concerning the influence of a magnetic field on the spectra of iron and titanium through a considerable range of wave-length, and to present this in such form as would be useful for reference in connection with questions concerning the effect of a magnetic field on the spectrum lines, such as those arising in investigations on sun-spots, as well as for comparison with the known phenomena of the Zeeman effect for spectra other than those of iron and titanium. The tables are designed to give an accurate description of all lines between 3700 and X 6700, so far as it has been possible to photograph them. The measurements of magnetic separations for each spectrum through this range show clearly the degree in which the separation changes with the wave-length. The complex types as well as the simpler are studied with reference to the prevalence of a fundamental interval between the components. Numerous cases are noted of the recurrence of certain types of separation, and while the search for series relations in these many-lined spectra has not proved fruitful, the descriptions of the type of separation show whether certain lines are possibly connected, or whether they unquestionably arise from different radiating particles. A few cases of dissymmetry among components are given in the tables. It has been possible, by reason of the large amount of material collected, to make a detailed comparison between the Zeeman separation and the displacement of lines produced by pressure around a light source, and it is shown to what degree a correspondence exists. The reproductions of spectra which are given are of selected regions showing the various types of magnetic separation and the behavior of groups of lines which are of special interest in other investigations on these spectra. The desirability of making the material as complete as possible has necessitated photographing the weaker lines in these two spectra so far as they were obtainable, a condition which has added to the labor and altered to some extent the experimental methods that would have been used for the stronger lines alone. The tables for titanium contain all but the weakest of those lines given in the regular lists of arc and spark lines. As much can not be claimed for iron, however, as numerous lines, fairly strong in the arc, are not brought out by the spark in the magnetic field even with an exposure of many hours. This is especially true of lines of diffuse appearance, which are particularly numerous in the iron spectrum. The results of a number of investigations on the Zeeman effect for certain parts of the iron spectrum have been published, and will be spoken of in the historical summary to follow. These are fragmentary, however, with some discordances, and it is believed that there is little real duplication in the present paper, even for those parts of the spectrum which have been treated to some extent by others. 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.