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More than purple not existing, brown really doesn't exist. Brown is just reflected orange-y light in the right context. You can play around with it, by looking
by automatic6131 2y ago
More than purple not existing, brown really doesn't exist. Brown is just reflected orange-y light in the right context. You can play around with it, by looking at a picture of say, earthy soil, color picking that pixel and painting it on a white canvas in a different way. Or by trying to shine an RGB light with that color code. It will look orange in a direct light.
Also the purple hallucination is because the same cone that mostly detects red also has a small peak futher along the spectrum next to blue. Since it slightly reacts to blue/violet light, you get that purple tickle.
- latexr 2y agoTechnology connections made a video on it. https://www.youtube.com/watch?v=wh4aWZRtTwU https://www.youtube.com/watch?v=wh4aWZRtTwU
- LuciOfStars 2y agoCame here looking for this haha, Alec's videos are always a treat.
- automatic6131 1y agoThank you, I couldn't remember who made it, thought it was Knowing Better for some reason
- masfuerte 2y agoAccording to this [1] that extra bump is a myth. But I'm not qualified to judge. [1]: https://physics.stackexchange.com/questions/673991/red-cones-spectral-sensitivity https://physics.stackexchange.com/questions/673991/red-cones...
- hnuser123456 2y agoI wonder if near-UV like 380nm starts exciting the red receptor at 760nm like a resonant frequency or harmonic. Would also explain why something that's deeply red enough doesn't start looking purple, because the lower-energy photons can't get the higher energy receptors to trigger, unlike the other way around for deep blue. Which would make the color purple a distinctly quantum phenomenon.
- 9rx 2y ago> brown really doesn't exist. Brown is just reflected orange-y light in the right context. The Pirahã language only has two words for "color" – which more or less translate to "light" and "dark". Therefore red, green, blue, even orange don't really exist either. Except they do, because we've defined them to exist. Brown is no different.
- latexr 2y agoBrown is different, because you can only see it in the right context, otherwise it becomes orange. You cannot create brown light sources. https://www.youtube.com/watch?v=wh4aWZRtTwU&pp=0gcJCdgAo7VqN5tD https://www.youtube.com/watch?v=wh4aWZRtTwU&pp=0gcJCdgAo7VqN... Not naming certain colours does not mean they cease to exist. They can be split, created, and we have the receptors to perceive them.
- 9rx 2y ago> Brown is different, because you can only see it in the right context, otherwise it becomes orange. But that's how it is defined, so no, it is not different.