Abstract
REFERRING to Dr. F. C. Toy's letter, under the above heading, in NATURE of January 16, p. 83, Dr. John S. Anderson and I came to the same conclusion in an investigation published in the Proc. Roy. Soc. Edin. fourteen years ago. In the words of this paper, “Only when two beams of light of the same wave-length fall on adjacent parts of the same photographic plate and produce equal blackening in the same time can we say that their intensity is equal.” This principle was made the basis of all the work we did at that time on ultra-violet spectrophotometry. But there are some fields, such as astrophysics, where it cannot be applied.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
HOUSTOUN, R. Measurement of Radiation Intensities by Photographic Methods. Nature 117, 159 (1926). https://doi.org/10.1038/117159c0
Issue Date:
DOI: https://doi.org/10.1038/117159c0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.