this post was submitted on 01 Aug 2024
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Facepalm

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Anything that makes you apply your hand to your face.

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[–] laughterlaughter@lemmy.world 11 points 3 months ago (3 children)

Let's not be pedantic. White is a color.

Yeah, yeah, white is composed of all wavelengths, just like green is composed of the yellow wavelength and the blue wavelength.

[–] AeonFelis@lemmy.world 11 points 3 months ago (2 children)

green is composed of the yellow wavelength and the blue wavelength

  1. You are confusing wavelengths and photoreceptors. All the colors in the rainbow have a wavelength - both yellow and green. There are colors, like pink, that don't have their own wavelength - and white is one of these colors.
  2. Between green and yellow, yellow is the one who doesn't have its own photoreceptor in the human eye and thus the yellow we see is actually composed of red and green.
  3. The yellow + blue = green thing is a concept of subtractive colors - which means the formula is actually white - yellow - blue = green.
[–] renzev@lemmy.world 3 points 3 months ago* (last edited 3 months ago)
[–] SkunkWorkz@lemmy.world 5 points 3 months ago* (last edited 3 months ago) (2 children)

Green has its own wavelength, 500–565nm. It’s pink that doesn’t have one and is a mix between violet and red wavelengths.

[–] laughterlaughter@lemmy.world 1 points 3 months ago

Today I learned about the composition of pink. Thanks.

[–] Swedneck@discuss.tchncs.de 0 points 3 months ago (1 children)

i mean you're technically almost correct, pink doesn't have a wavelength because it's just white with a bit more red in it.

You're thinking of magenta, which is equal parts BLUE and red, violet is another word for purple which is also red and blue but darker and more on the blue side.

[–] SkunkWorkz@lemmy.world 1 points 3 months ago* (last edited 3 months ago) (1 children)

Violet is not purple since violet is a spectral color and has its own wavelength. While purple is a secondary color. If violet was also a secondary color made from blue and red you wouldn’t see it in a rainbow. https://en.wikipedia.org/wiki/Spectral_color

[–] Swedneck@discuss.tchncs.de 0 points 3 months ago* (last edited 3 months ago) (1 children)

"In the RGB color model used in computer and television screens, violet is produced by mixing red and blue light, with more blue than red."
"Violet is closely associated with purple. In optics, violet is a spectral color (referring to the color of different single wavelengths of light), whereas purple is the color of various combinations of red and blue (or violet) light,[5][6] some of which humans perceive as similar to violet. In common usage, both terms are used to refer to a variety of colors between blue and red in hue."
https://en.wikipedia.org/wiki/Violet_(color)

[–] SkunkWorkz@lemmy.world 1 points 3 months ago* (last edited 3 months ago)

Okay violet is purple in common usage. I was talking in scientific terms since I was talking about wavelengths and spectral colors. You just pointed out the same thing I said that violet is a spectral color and has its own wavelength and is different from the secondary color purple. Violet is only purple in every day speech, not when you talk about the science of electromagnetic waves. And trying to disproof my point with RGB colors is just dumb, since we were obviously not talking about artificial light. Yes you can mimic violet with red and blue but that doesn’t disproof that violet has its own wavelength.

[–] StuffYouFear@lemmy.world 4 points 3 months ago

Clear is my favorite color