Open AccessThe refraction and dispersion of neon and helium
Author(s) -
Clive Cuthbertson,
Maude Cuthbertson
Publication year - 1932
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.1932.0019
Subject(s) - neon , dispersion (optics) , refraction , helium , trustworthiness , physics , atomic physics , optics , psychology , social psychology , argon
Some apology is needed for a third paper, by the same authors, on the refraction and dispersion of neon. In 1909 we published determinations made with 300 c. c. of gas purified by H. E. Watson for Sir William Ramsay. The index for the green mercury line (λ 5462·23) was found to be 1·00006716. For the dispersion the cadmium red (λ 6438) and blue (λ 4800) lines were also used, and the results were found to be expressed by the formula μ – 1 = 2·5665 ⨯ 1027 / 38517 ⨯ 1027 – n2 , wheren is the frequency of the light = V/λ. Only 200 bands could be counted, and the figures for the dispersive power were not believed to be trustworthy to less than 5 per cent.