Abstract
IF a pattern consisting of blue and yellow areas be viewed at a sufficient distance by an observer, then, in certain circumstances, the blue is seen as black and the yellow is seen as white, so that the pattern appears to be a black and white one. Factors of importance in determining whether the pattern is seen as blue and yellow or as black and white have been found to be (1) the size of the pattern, (2) the intensity of illumination, (3) the size of the pupil, (4) the exact colours of the yellow and the blue pigments used in the design, (5) the adaptation of the retina, (6) spectral content of illuminant. It is suspected that factors of importance would also be (7) absorption of the eye media, and (8) absorption by the macula lutea.
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HARTRIDGE, H. Visibility of Blue and Yellow. Nature 153, 775–776 (1944). https://doi.org/10.1038/153775a0
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DOI: https://doi.org/10.1038/153775a0
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