Studies in the photometry of lights of different colours / by Herbert E. Ives. : spectral luminosity curves obtained by the equality of brightness photometer and the flicker photometer under similar conditions.

  • Ives, Herbert Eugene, 1882-1953.
Date:
[1912]
Catalogue details

Licence: In copyright

Credit: Studies in the photometry of lights of different colours / by Herbert E. Ives. : spectral luminosity curves obtained by the equality of brightness photometer and the flicker photometer under similar conditions. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    / jProwi Philosophical Magazine for July 1912. COMPLIMENTS OF THE AUTHOR Studies in the Photometry of Lights of Different Colours. By Herbert E. Ives. [Plates III.-V.] I. Spectral Luminosity Curves obtained by the Equality of Brightness Photometer and the Flicker Photometer under similar conditions. Synopsis. Introduction. 1. Difficulties in determination of luminosity in the presence of colour difference. 2. Existing methods of heterochromatic photometry. a. Equality of brightness. b. Visual acuity. c. Critical frequency. d. Flicker photometer.