Comment on Does sunlight through UV-blocking windows warm you less than unfiltered sunlight?

Mammothmothman@lemmy.ca ⁨2⁩ ⁨months⁩ ago

• AbouBenAdhem@lemmy.world ⁨2⁩ ⁨months⁩ ago

  Infrared is the frequency emitted by warm objects—that doesn’t mean it’s the only frequency that makes objects warm.

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  • Hansie211@lemmy.world ⁨2⁩ ⁨months⁩ ago

    I think my microwave has something it wants to say

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    • OutlierBlue@lemmy.ca ⁨2⁩ ⁨months⁩ ago

      Is it “mmmmmmmm”?

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• cecilkorik@lemmy.ca ⁨2⁩ ⁨months⁩ ago

  That’s false. You can literally not only feel heat from, but you can in fact set things on fire with, a completely monochromatic green laser with a wavelength exactly in the middle of the visible spectrum. No infrared, no ultraviolet. Lots of heat transfer. You could do it with an ultraviolet laser too if you were careful enough and could get around ultraviolet’s tendency to destroy molecular bonds completely before they even have a chance to burn chemically. Any light contains a large amount of energy and that’s still true whether it’s infrared, ultraviolet, or somewhere in between.

  Infrared has a special relationship with heat, yes, because of the distribution of blackbody radiation, but “No” is absolutely the wrong answer here. The right answer is “Yes, but… it’s complicated”.

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• teft@lemmy.world ⁨2⁩ ⁨months⁩ ago

  This is correct but also glass blocks both ends of the spectrum. Really just visible light goes through glass. You get some near IR passthrough but not much.

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  • AbouBenAdhem@lemmy.world ⁨2⁩ ⁨months⁩ ago

    There’s glass that doesn’t block UV frequencies—like the glass used in tanning booths, UV lights, and UV cameras.

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