Studies in the photometry of lights of different colours [electronic resource] / spectral luminosity curves obtained by the equality of brightness photometer and the flicker photometer under similar conditions (1912)
Ives, Herbert Eugene, 1882-1953, Parsons, John Herbert, Sir, 1868-1957, donor, University College, London. Library Services · [London : s.n.] · leaf 75
Photometry of Lights of Different Colours. 746 be considered " correct." The previous work of the writer cast doubt on this belief, since the equality of brightness luminosity curves were found to change their shape and position after intervals of time sufficient to destroy one's Fisr. 1. … •SO '5Z -54- -56 -5Q -60 -62 -64- '(.bft memory of previous settings. The present work seems to be conclusively against the belief that a " correct 99 criterion of equal brightness may be attained by mere practice. While with any given comparison source quite definite and con- sistent spectral…
Ophthalmology · Eye · Light · Color blindness · Color vision · Photometry · Brightness perception · Color Vision Defects
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.
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