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- W2030342148 abstract "ALTHOUGH it is generally accepted that visual purple plays an essential part in the process of scotopic vision, attempts1 at relating the human scotopic luminosity curve (for equal energy spectrum) with the extinction (absorption) coefficient curve of amphibian or mammalian visual purple have shown a difference in the wave-length position of the maxima. Hecht and Williams2, using a constant stimulus method, found that the maximum of this luminosity curve was at 510 m This was a mean value for forty-eight young observers, and there was little variation. Abney and Watson3, using a threshold intensity method, found that the maximum of the luminosity was at 505 m. for three monochromats." @default.
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- W2030342148 date "1937-03-01" @default.
- W2030342148 modified "2023-10-16" @default.
- W2030342148 title "Scotopic Luminosity Curve and the Absorption Spectrum of Visual Purple" @default.
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- W2030342148 doi "https://doi.org/10.1038/139409b0" @default.
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