• wraekscadu@vargar.org
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    3 days ago

    From what I recall, the reason why they specifically reflect the green is to moderate the amount of sunlight they absorb.

    Hence, if plant life exists, around red dwarfs, it is likely to be red in color.

    • socsa@piefed.social
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      15 hours ago

      Lots of plants which are naturally adapted to shade growth actually do turn redish in direct light. Lots of the more exotic and fancy looking ferns and begonias get their unique patterns and colors from this being bred into the cultivar.

    • Tollana1234567@lemmy.today
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      3 days ago

      purple i believe would be pretty extreme. in SGU show they found a planet with purple plants because of the red dwarf. there are plenty of plants irl that are purple though.

        • Wren@lemmy.today
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          3 days ago

          If you want to split up the emission spectrum, a red dwarf isn’t exactly red, either.

          • XeroxCool@lemmy.world
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            1 day ago

            Why are you being so condescending in this thread and still missing the root of the point? The sun’s emission spectrum has more green in the visible band than the other colors. The emission spectrum you keep mentioning. By wavelength distribution, the sun would be “green”. But, because our eyes are terrible spectrometers with bad wavelength resolution but we still like to use crayon descriptions, all the red and green gets interpreted as a combined yellow. You made a snobby comment about how all your art students understand how paint (subtractive) color works, but are you aware how light (additive) color works? Like why an RGB light can make yellow with red and green? Because that’s what makes our yellow sun “green” by certain metrics.

            So it stands to reason that if plants were predominantly green on Earth to reject and regulate green-wavelength energy from our sun, a red dwarf, which has more red output, could cause red plants to develop.

            A red dwarf isn’t exactly red. Our sun isn’t exactly yellow. Our sun isn’t exactly green, either.

            • Wren@lemmy.today
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              3 days ago

              We absolutely would. Aside from the fact that our sun is called A Yellow Sun both colloquially and in astronomy (source: took astronomy, was in astronomy club, still have astronomy textbooks that say “Our sun is a yellow sun,”) I’m not sure you know what an emission spectrum is.

              Why would we see other colours? Because there are elements that emit different wavelengths when heated, and like, uranium and shit.

              • Victor@lemmy.world
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                3 days ago

                I’ve not heard the term emission spectrum before today but it isn’t hard to understand what it is if you’re interested in astronomy and science like the two of us are.

                Interesting detail about emitting light when heated, but surely that isn’t particularly common and powerful enough to show the variety of color we see with our white-light sun?

                • Wren@lemmy.today
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                  3 days ago

                  I don’t know what you’re trying to say or ask anymore. Everything emits light when heated, I’m sure you have an oven, a stove and lightbulbs.

                  Someone said the plants around a red dwarf would be red. I sarcastically replied, implying that wasn’t true because most plants aren’t yellow.

                  You said the sun isn’t yellow. It is a yellow sun.

                  • Victor@lemmy.world
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                    3 days ago

                    You yourself mentioned the emission spectrum, right?

                    I just did some “light” (ha) research, found a random link: https://www2.hao.ucar.edu/education/about-the-sun/what-kind-light-does-sun-emit

                    Anyway: The sun doesn’t emit just yellow light, is what I’m saying. So the counter argument about yellow plants just doesn’t hold weight from my understanding.

                    The sun is slightly tinted towards the yellow side as viewed from earth perhaps, due to atmospheric scattering, especially Raleigh scattering. But not enough to cause everything to appear yellow. And not because they emit light when heated.

                    Not everything is glowing hot just under the sun.

                    Is this not a sound argument?