Photometry of the Gas-Filled Lamp (Classic Reprint)
Language: English
Published by Forgotten Books, 2024
- Softcover
- New
Seller: Forgotten Books, London, United KingdomForgotten Books
AbeBooks seller since June 2, 2021
Condition: New
£ 13.14
Quantity: Over 20 available
Add to basketItem description from seller
Print on Demand. This book, a thorough exploration of gas-filled lamps, delves into the new variables and photometric difficulties encountered in their use. The author, a renowned scientist at the Bureau of Standards, presents a systematic study of these variables, determining the relationship between voltage, current, speed, and candlepower when the lamp is rotated. This study led to the discovery of a unique phenomenon: at constant voltage, current and candlepower change in opposite directions when the lamp is rotating. The author further explains the cause of this variation, attributing it to changes in convection currents within the bulb, which in turn affects the temperature distribution and resistance of the lamp. Through careful experimentation, the author establishes a practical method for accurately measuring mean horizontal candlepower in gas-filled lamps, free from the errors caused by rotation. This method, along with the author's in-depth analysis of the underlying principles, enhances our understanding of gas-filled lamps and aids in their precise photometry. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book.…
Seller Inventory # 9781334318313_0
- Title
- Photometry of the Gas-Filled Lamp (Classic Reprint)
- Author
- G. W. Middlekauff, J. F. Skogland
- Publisher
- Forgotten Books
- Publication year
- 2024
- Condition
- New
- Book Type
- print-on-demand item
- Binding
- Paperback
- Language
- English
- ISBN 10
- 133431831X
- ISBN 13
- 9781334318313
- Seller catalogs
- Electronics
As the filament has a positive temperature-resistance coefficient, the resistance decreases and consequently the current increases at constant voltage. At high values of voltage the mean temperature of the gas is higher than at low voltage, consequently the tempera ture of the filament is reduced in a lesser degree by rotation and the change in current, though positive, is less at high than at low voltage.
On the other hand, when the lamp is rotated at high speeds the cooler gas at the bottom of the bulb is thrown out by centrifugal force, which varies as the square of the speed, and the hot gas tends to remain near the center, thus considerably retarding the convection currents which cool the filament. The result is an increase in the resistance of the filament as a whole and a decrease in the value of the current. At high voltages the mean tempera ture of the gas is higher than at low voltage and the retarding efiect due to centrifugal force is decreased; hence the change in current due to rotation is less than at low voltages.
At low speeds, as seen above, the temperature of the filament is lowered and consequently the candlepower is decreased. At high speeds the temperature of the filament is raised, and hence there is an increase in the candlepower.
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.
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Forgotten Books
London, United Kingdom
AbeBooks seller since June 2, 2021
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Forgotten Books’ Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the quality of the aged text.
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FB &c Ltd
Dalton House, 60 Windsor Avenue
London, United Kingdom SW19 2RR
Forgotten Books publishes hundreds of thousands of rare and classic books.
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.
This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value.
The digital edition of all books may be viewed before purchase if you request a sample.
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