The Reflecting and the Absorbing Power of a Photographic Emulsion

Authors

P. S. HelmickFollow

Document Type

Research

Abstract

Measurements have been made upon the reflecting and the absorbing power of silver bromide emulsion with wave-lengths between 2100A and 5782A. The reflecting power of silver bromide emulsion averages about 7 per cent for the region 2100A to 5200A. A thickness of emulsion (0.021 mm) as found in a commercial photographic film absorbs about 96 per cent of incident radiation between 5218A and 5782A, and more than 99.99 per cent of radiation whose wave-length is less than 3247 A. From 5782A to at least 2294A the gelatine in a photographic emulsion has a negligible absorption as compared with the absorption of the silver bromide of the emulsion.

Publication Date

1923

Journal Title

Proceedings of the Iowa Academy of Science

Volume

30

Issue

1

First Page

76

Last Page

76

Copyright

©1923 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Helmick, P. S. (1923) "The Reflecting and the Absorbing Power of a Photographic Emulsion," Proceedings of the Iowa Academy of Science, 30(1), 76-76.
Available at: https://scholarworks.uni.edu/pias/vol30/iss1/17