Inhaltsangabe
Excerpt from Photoelectric Spectrophotometry by the Null Method
Another source of trouble in most deflection methods has been the difficulty of eliminating the so-called dark current; 1. E., the current through the cell when not irradiated.5 When this has not been completely eliminated or balanced, its magnitude has usually been measured and corrections made in the computa tions. Gradually, however, the technique of making photo electric cells has been improved, until now most of the cells made on the black-body -principle are found to obey very nearly the straight-line relationship, and the dark current can be much more easily suppressed.
Nevertheless, a method which eliminates any. Possible errors and the necessity of any tests, calibrations, 'or corrections due to these two factors is of much greater value and reliability than is any method into which these factors may enter.
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.
Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.
Weitere beliebte Ausgaben desselben Titels
Suchergebnisse für Photoelectric Spectrophotometry by the Null Method...
Foto des Verkäufers
Photoelectric Spectrophotometry by the Null Method (Classic Reprint)
Print-on-DemandAnbieter: Forgotten Books, London, Vereinigtes Königreich
Verkäuferbewertung 4 von 5 Sternen
Paperback. Zustand: New. Print on Demand. This book details a novel method for measuring spectral transmission that the author has developed, using a photoelectric cell in combination with an electrometer in a null method. This method has a number of advantages over other existing methods: it eliminates errors due to the photoelectric current not being strictly proportional to the radiant power incident on the cell, eliminates errors due to dark current, and eliminates errors due to the use of the electrometer as a deflection instrument. The author describes the apparatus used in detail, including the spectrometer, the photoelectric cells, the electrometer, and the rotating sector. The author also provides instructions on how to use the apparatus and how to calculate the transmission of a specimen. This book will be of interest to anyone interested in the measurement of spectral transmission, including physicists, chemists, and engineers. 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. print-on-demand item. Bestandsnummer des Verkäufers 9781333934835_0
Neu kaufen
EUR 15,29
Versand gratis
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: Mehr als 20 verfügbar
Beispielbild für diese ISBN
Photoelectric Spectrophotometry by the Null Method Classic Reprint
Anbieter: PBShop.store US, Wood Dale, IL, USA
Verkäuferbewertung 5 von 5 Sternen
PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LW-9781333934835
Beispielbild für diese ISBN
Photoelectric Spectrophotometry by the Null Method Classic Reprint
Anbieter: PBShop.store UK, Fairford, GLOS, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LW-9781333934835
Neu kaufen
EUR 24,04
EUR 3,81 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 15 verfügbar