User talk:Phonoscript

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Happy editing! --Srleffler (talk) 21:17, 18 December 2022 (UTC)

Visible spectrum
Thanks for catching the magenta in that image at Visible spectrum. I disagree with one thing in your comment though: showing only red, green, and blue would be wrong. Each spectral wavelength has its own reflectivity when a surface is illuminated, and the human eye combines all of them to create perceived color. While you can simulate a wide range of colors by combining red, green, and blue, our eyes do a lot more than that. --Srleffler (talk) 21:17, 18 December 2022 (UTC)


 * I was wrong: the usual way to model reflective color dynamics, at least on the internet, is with an illustration similar to yours. But even when fixed (cyan added, magenta removed), that model can't show these phenomena correctly. For example, magenta's non-spectral nature would make it colorless, and the magenta family of colors (purples, etc.), along with the millions of other non-spectral colors, would be distorted to varying degrees. Maybe the instinctive reply for magenta would be "just mix red light and blue light" — but that would require switching, temporarily, from the spectral-color model to the trichromatic (RGB) model, employing two very different models at the same time. Which makes my head hurt.
 * I think you misunderstood me. I wasn't saying remove all spectral colors except red, green & blue — of course that would lead to nothing. I was referring to trichromacy, which can handle all colors, and where the mixtures are logical. The red arrow doesn't mean a red spectral color is hitting a surface, rather it signifies electromagnetic radiation in the long wavelength area. So for example, strong reflections of red + green = yellow, with blue absorbed. There's no reason why yellow has to be a spectral hue.
 * Anyway, thanks for replying, and excuse me if you already know all this. Phonoscript (talk) 15:01, 26 December 2022 (UTC)