On the absolute wavelength of light

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Abstract
Up to the present time, Angstrom's map of the solar spectrunl and with it his determination of absolute wave length, has remained the final standard of reference in all spectroscopic matters.But since Angstrom's work was published, optical science, particularly that part of it which deals with the manufacture and use of diffraction gratings, has made enormous progress.It is now possible with the concave grating to measure relative wavelengths with an accuracy far greater than can be claimed for anyone of the absolute determinations.The numbers given by Angstrom are now known to be too small by as much as one part in seven or eight thousand, as has been shown by ThaIen in his monograph "Sur Ie spectre du Fer," and since Angstrom's work but one careful determination has been made.This is by Mr. C. S. Peirce and was undertaken some eight years since for the U. S. Coast and Geodetic Survey.No full report of this work has as yet been published, though it is evidently very careful and has already consumed several years.Certain results were communicated to Prof. Rowland of this U ni versity to serve as a standard of reference for his great map of the solar spectrum now neal•]y completed, and it was to serve as a check on these results and to furnish a value of the absolute wave
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openalex_W2314196503 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Louis Bell
Journal american journal of science
Year 1887
DOI
10.2475/ajs.s3-33.195.167
URL
https://doi.org/10.2475/ajs.s3-33.195.167
Keywords Keywords not found

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