Comment on Halloween Botany

• chuckleslord@lemmy.world ⁨5⁩ ⁨weeks⁩ ago

  Violet and purple are distinct terms here.

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• general_kitten@sopuli.xyz ⁨5⁩ ⁨weeks⁩ ago

  We call it that but our eyes see the far end frequency as a colour that only very slightly activates blue sensitive cone receptors and no others. For red sensitive cones there is a slight bump in the high end frequencies also that makes it possible for them to look violet as it activates the blue sensitive and a bit of red sensitive receptors but a much purpler purple is made by combining high and low frequencies

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  • AEsheron@lemmy.world ⁨5⁩ ⁨weeks⁩ ago

    There is evidence to show that violet does actually weakly activates red cones too. This is because the violet light starts creeping up to double the frequency of the lower end of the red sensitivity, and so it can actually successfully activate it very weakly. There are other factors that can lessen or even fully negate that effect though, it’s all kind of fuzzy.

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• psud@aussie.zone ⁨4⁩ ⁨weeks⁩ ago

  Violet is dark spectral blue, added as a separate color by people who wanted 7 not six colors in the spectrum

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  • exasperation@lemm.ee ⁨4⁩ ⁨weeks⁩ ago

    You’re thinking of indigo.

    Red

    Orange

    Yellow

    Green

    Blue

    Violet

    That’s 6.

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    • psud@aussie.zone ⁨4⁩ ⁨weeks⁩ ago

      Perhaps it was the number I misremembered. There definitely is no violet in the spectrum

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