Color perception is an ancient and active philosophical problem. It’s an instance of the wider category of sensory perception, but since the color spectrum fits on a single line (unlike, say, touch and taste), it has always been of particular interest. In her new bookOutside Color, University of Pittsburgh professor M. Chirimuuta gives a serendipitously timed history of the puzzle of color in philosophy. To read the book as a layman feels like being let in on a shocking secret: Neither scientists nor philosophers know for sure what color is.
“Of all the properties that objects appear to have,” Chirimuuta writes, “color hovers uneasily between the subjective world of sensation and the objective world of fact.”
And I also thought colour was just different wavelengths that we "see"...
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