zwischendenstuehlen:optimistictheoristsweets:whatfulllipsyouhave:meredithalden:a public service anno

zwischendenstuehlen:optimistictheoristsweets:whatfulllipsyouhave:meredithalden:a public service announcementI still don’t understand why none of my art teachers ever told us this.This is just so helpful.I’m sorry, but it is not yet helpful enough for me…. It’s true, somehow, but as someone who has grown up through art lessons with the different, yet also designed to look very symmetric and convincing red-yellow-blue color spectrum, I’ve been REALLY unhappy and confused forever about all of this:- WHY is CMY(K) better? I believe it is and my personal experience agrees, but can somebody science it to me? Like, with wavelengths or stuff? Not just “the only fucking legitimate”, no offense to the OP?- And WHY would somebody, like, EVERYBODY, teach anything else at school? With a lot of conviction and coherence? - And how does it go together with RGB as the primaries of additive colour mixing? Shouldn’t they be in the middle in between CMY on the spectrum, but in the picture above they aren’t totally? - I tried to read the physics, but it didn’t make me see a system in all of it. I mean, I don’t even get how placing the colors into a CIRCLE makes sense, because the wavelengths are just on a scale, and stillt, the circle is practically very useful.Science side of tumblr, can you help?Well, let the physicist (who is neither an artist nor a biologist) try her best to explain:What does it mean when we see white or black, and what dose it mean when we see color (excluding pink for now)?Most basic explanation:- Seeing a color can mean we see light that has a certain wavelength, e.g. green = 500.0 nm (having such a sharp wavelength means you are probably watching a laser, handle with care), or that has a certain wavelength range e.g. green = 470-530 (roughly)- Seeing black just means that there is no light.- Seeing white means we see all wavelength between 400 - 650 nm at the same time. Our brain translates this to white.But seeing color is a bit trickier than that:Imagine you see yellow. This could be emission at exactly 570 nm. But it could also be emission from 470-650 micron. Your brain makes yellow if it sees this wavelenth range, just like it makes white when you look at the entire spectrum.So in a way, red green and blue are exclusive colors (my description, not an oficial term). When your brain registers red, only ‘red wavelength photons’ are around.Cyan, yellow and pink are inclusive colors: Yous see yellow, but there is actually green, yellow, (orange) and red around. Your brain will also see yellow if there is only green and red.Cyan is the same as yellow, but with blue and green. Now, pink/magenta is a special case. It does not have a wavelength. It is just what your brain creates when it sees red and blue wavelength, roughly 420-440 (blue) and 630-670 (red). Pink is just your brains signal for two different, non-overlapping wavelength ranges at once. (The brain is amazing)So, now that we now this, we go on. How do you see color? And what is the physical color red?1. Someone shines a light at you, for example a monitor. Now, if you see red, the monitor is emitting in the red wavelength area 630-670 nm. If now in addition, it also emits in the green area 470-530 nm, your brain sees yellow, because their is emission between 470-670 nm. I f nothing emits, the monitor is black.This is called additive mixing. Wavelength ranges are added to each other by emitting diods.2.Compared to the monitor, the paper is white. The color red on the paper is not created by pigment that shines red. Instead, it is created by pigment that removes (absorbs) every wavelength except red. Only light between 630-670 nm is left.Now imagine you mix green with that. Green absorbs everything except 470-530 nm (in this example, it removes the red light between 630-670nm). But nothing is left there, that has already been absorbed by the red pigment. All becomes black.It is subtractive mixing. Red printing pigment should be called: Removes every color but red.If you do subtractive mixing, you should use colors were something is left after subtraction: the inclusive colors:Pink: Removes everything but blue and redYellow: Removes everything but green and red:Leaves you with red :)Disclaimer: I work in the near-infrared, so all of this is a bit of a hobby. The wavelength ranges are also handwaving, they are for demonstration, not precisions.@zwischendenstuehlen​ : hope this helps -- source link

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