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 57

An illustration from 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, leaf 57 — Photometry of Liglits of Different Colours. 355 the middle. He plots critical frequencies for constant slit- width, instead of slit-widths or reciprocal slit-widths for constant frequency as is here done. It is in this difference Fig. 2. … «oc «30 4<oO tao ,reo sso seo t>so 6va 6?o 7oo 730 7*0 Critical Frequencies of the spectral colours at high, medium, and low- intensities, showing- relatively greater change for red (R). After Haycraft. of procedure that we find the explanation of the difference between Hay craft's results and…

Ophthalmology · Eye · Light · Color blindness · Color vision · Photometry · Brightness perception · Color Vision Defects

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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)

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