The Blackening of a Photographic Plate as a Function of Intensity of Monochromatic Light and Time of Exposure

Authors

P. S. Helmick, State University of IowaFollow

Document Type

Research

Abstract

By an empirical modification of Hurter and Driffield's and Ross formulae, it has been possible to express the blackening of a photographic plate exposed to monochromatic light as a function of intensity of light and time of exposure with an accuracy within the limits of the experimental data at hand. By means of monographic charts the constants of the equations can be computed by semi-graphical methods.

Publication Date

1921

Journal Title

Proceedings of the Iowa Academy of Science

Volume

28

Issue

1

First Page

119

Last Page

119

Copyright

©1921 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Helmick, P. S. (1921) "The Blackening of a Photographic Plate as a Function of Intensity of Monochromatic Light and Time of Exposure," Proceedings of the Iowa Academy of Science, 28(1), 119-119.
Available at: https://scholarworks.uni.edu/pias/vol28/iss1/25