Open AccessThe effect of pressure upon Arc spectra. no. 2.— copper, λ 4000— λ 4600
Publication year - 1908
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.1908.0093
Subject(s) - copper , arc (geometry) , optics , rod , reflection (computer programming) , atmosphere (unit) , spectral line , materials science , analytical chemistry (journal) , chemistry , metallurgy , physics , mathematics , meteorology , geometry , computer science , medicine , alternative medicine , pathology , chromatography , astronomy , programming language
A direct current arc from 100-volt mains was formed between copper rods within a pressure cylinder designed by Professor J. E. Petavel, F. R. S. The light passed through a glass window, and, after reflection from two mirrors, was focussed upon the slit of the large Rowland grating spectroscope in the Physical Laboratories of the Manchester University. The apparatus and method of using it have been described in a previous paper. The spectrum of the copper arc in air has been photographed in the regionλ = 4000 toλ = 4600 Å. U. at the following pressures: 5, 10, 15, 20, 30, 40, 50, 60, 70, 80, 100, 125, 150, 203 atmospheres (excess above 1 atmosphere).