Author: Sarah Frances Whiting
Publisher: Rarebooksclub.com
Published: 2013-09
Total Pages: 28
ISBN-13: 9781230174570
DOWNLOAD EBOOK →This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...at lower temperature will absorb light given out by the same at higher temperature. If white light be transmitted through vapors at lower temperature, it will be deprived of the wave lengths characteristic of each vapor. It will give a broken spectrum. 4. A widening of lines in general indicates that the source of light is undergoing pressure. 5. Doppler's principle. A displacement of lines toward the red end of the spectrum indicates that the source of light is receding; a displacement toward the blue, that the source is approaching. 6. A coincidence of reversed lines in the spectrum of sun or star, with bright lines obtained from some element in the laboratory, indicates the presence of that element. 7. Zeeman's principle. If a source of light is placed in a magnetic field, the simple lines of its spectrum will be resolved into triplets or more complex forms. EXERCISE XXV USE OF CLOCKS Clocks are of two kinds: 1. Those which keep sidereal time; that is, the actual time of the earth's rotation. These " sidereal clocks" begin the day, 0h 0m 0!, at what is called " sidereal noon," the instant when the vernal equinox crosses the meridian. They are graduated into twenty-four hours. 2. Those which keep " mean time"; that is, which mark noon when the fictitious sun crosses a certain meridian. They may keep a. Local mean time; that is, mark noon when the fictitious sun crosses the meridian of the place. b. Standard time; that is, mark noon when the fictitious sun crosses the standard meridian. c. Civil mean time, which begins the day at midnight. "d. Astronomical mean time, which begins the day at noon. Description of clocks at Whitin Observatory.i 1. The sidereal clock is by E. Howard & Co. of Boston. It...
Author: Sarah Frances Whiting
Publisher: Forgotten Books
Published: 2017-07-25
Total Pages: 312
ISBN-13: 9780282588878
DOWNLOAD EBOOK →Excerpt from Daytime and Evening Exercises in Astronomy: For Schools and Colleges The only astronomical laboratory books known to the writer are those of the South Kensington School of Science in London, and of Miss Byrd and Professor Robert Willson. 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.
Author: Sarah Frances Whiting
Publisher: Nabu Press
Published: 2014-01-13
Total Pages: 136
ISBN-13: 9781294506133
DOWNLOAD EBOOK →This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Author: Wellesley College. Department of Astronomy
Publisher:
Published: 1940
Total Pages: 156
ISBN-13:
DOWNLOAD EBOOK →Author: Wellesley College. Department of Astronomy
Publisher:
Published: 1935
Total Pages: 164
ISBN-13:
DOWNLOAD EBOOK →Author: Wellesley College. Department of Astronomy
Publisher:
Published: 1933
Total Pages: 92
ISBN-13:
DOWNLOAD EBOOK →