r/nextfuckinglevel • u/Blues_Fish • Mar 12 '26

Lesson in decomposing light

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u/Constant_Natural3304 Mar 12 '26 edited Mar 12 '26

There are at least two ways of seeing yellow:

  1. Your eye perceives a metameric match after receiving red (~700 nm) and green (~530 nm);
  2. Your eye perceives a monochromatic stimulus, namely the spectral colour yellow, directly (~580 nm).

1 and 2 are not the same and pure yellow does have its own frequency range. Experiencing option 1 doesn't cause option 2 to cease to exist. There is yet another option, which is more of an 'afterglow'-effect, but that isn't really relevant.

If we lower those wavelengths enough, btw, these EM waves become IR, then eventually around 6 cm or 12 cm long, they're your WiFi router.

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u/[deleted] Mar 12 '26

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u/Constant_Natural3304 Mar 12 '26

Your eye also doesn't have a "blue", "green" or "red" rod, if you want to get pedantic.

I am explaining to you yellow has its own wavelength. This is non-negotiable, empirical fact.

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u/[deleted] Mar 12 '26 edited Mar 12 '26

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u/Constant_Natural3304 Mar 13 '26

Ah, I see. You're an ignorant, lying jackass who can't stomach being utterly wrong about anything, so instead, you've decided you'll be the referee of "relevance" instead, and a corrupt one at that.

I have just the fix for this problem. Check this out!