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Authors

R. F. Miller

Document Type

Research

Abstract

The measurements were made by a photographic method, for two positions of the crystal (1) with the optic axis parallel, and (2) with the axis perpendicular, to the plane of incidence. Two sets of optical constants were found for each substance. For selenium, in the parallel position the index of refraction was found to vary from 3.4 to 4.4, and the reflecting power from 0.38 to 0.46; in the perpendicular position the index varies from 2.3 to 3.1, and the reflecting power from 0.41 to 0.34. For tellurium, in the parallel position the index varies from 1.9 to 2.9, and the reflecting power from 0.10 to 0.27; in the perpendicular position the index varies from 1.7 to 2.7, and the reflecting power from 0.09 to 0.23. The average error is estimated to be about 5 per cent. The accuracy is greatest for the middle range of wavelengths, 3500-4000 A.

Publication Date

1924

Journal Title

Proceedings of the Iowa Academy of Science

Volume

31

Issue

1

First Page

375

Last Page

376

Copyright

©1924 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

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