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Dumbass kkkanadian$$ don't know how light works. (hexbear.net)

submitted 9 months ago by Posadas@hexbear.net to c/chapotraphouse@hexbear.net

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[-] plinky@hexbear.net 59 points 9 months ago* (last edited 9 months ago)

You see the light reflecting from paint doesn't actually become blue, it loses yellow

so if i put spectrophotometer, it won't show spike at 460 nm?

well, yes, it would

fucking nerds

[-] hexachrome@hexbear.net 15 points 9 months ago

a UV-vis spectrum of the pigment in their feathers should look like this and the observed light is from scattering instead of absorption processes. god fuck please wedgie me

[-] plinky@hexbear.net 12 points 9 months ago* (last edited 9 months ago)

yeah, but instead feathers look like this, also known as "really blue"

[-] hexachrome@hexbear.net 16 points 9 months ago

pedantic shit but since im shrivelling into a corn cob: reflectance spectroscopy on a bulk structure that reflects blue shows that it indeed reflects blue, not that the material comprising the structure itself transmits blue as with pigments

[-] plinky@hexbear.net 15 points 9 months ago

rage-cry <- this is me rn.

Pigments (typically used in non transparent dyes) don't transmit, they subtract parts of white light, and reflect what we call their color. Indigo does exact same shit - indeed reflect blue(tm).

its not "an optical illusion"

[-] hexachrome@hexbear.net 12 points 9 months ago

shit fair shout had internal transmittance and absorption mixed up. and yeah it's not an optical illusion, it's still reflecting blue light, just not as a direct result of electronic effects