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Authors

Frank F. Almy

Document Type

Research

Abstract

Humphreys and Mohler, in 1896-7, made an extended study of the effect of pressure upon the wave frequencies of the lines of the emission spectra of a larger number of the metallic elements. The source used was an enclosed electric arc about which the air pressure could be varied, the pressure being carried up to fourteen atmospheres. The results of their experiments indicate that all isolated lines shift toward the red end of the spectrum with increased pressure, the shift being proportioned to the wave length for lines of a given series, but the factor of proportionality being different for lines of different series.

Publication Date

1906

Journal Title

Proceedings of the Iowa Academy of Science

Volume

13

Issue

1

First Page

231

Last Page

232

Copyright

©1906 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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