Measurement of Radiation Intensities by Photographic Methods

Abstract

THE use of the photographic plate for the comparison of radiation intensities is becoming of greater importance every year. There are two essentially different methods available, and since considerable work is being done in connexion with the method which appears to us least sound, it does not seem out of place to record briefly the general principles involved, with the view of indicating which, in the opinion of the staff of the British Photographic Research Association, is to be preferred.