Open AccessOn the measurement of light absorption
Publication year - 1927
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1927.0128
Subject(s) - correctness , measure (data warehouse) , absorption (acoustics) , element (criminal law) , value (mathematics) , computer science , photoelectric effect , subject (documents) , divergence (linguistics) , optics , physics , data mining , algorithm , machine learning , law , philosophy , political science , linguistics , library science
Among the physical methods which have been suggested for the elucidation of chemical problems, the measurement of light-absorption is becoming increasingly important. Opinion is, however, still very divided concerning the utility of the different methods and the measure of trust which can be reposed in the results obtained. The element of uncertainty is so great that the correctness of conclusions based on the measurements is not infrequently questioned, and occasions have arisen in which the investigation of a problem by different methods has led to intrinsically different results. A specially clear case is found in the divergence between the photographic and photoelectric methods for the measurement of light absorption in the ultra-violet. For this reason we have thought it desirable to supplement in one or two directions the investigations of Baly, Morton and Riding on this subject. It must be stated at the outset that in judging the value of the methods under consideration theaim of the proposed investigation must first be ascertained.