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Despite plants being associated with the color green, chlorophyll is actually a poor absorber of green wavelengths of light.
Hence the reason plants are green, because they absorb the blue and red wavelengths of light, but reflect the green.
That's just how colour works.
Yep, but it is confusing for many, if not most people. A lot of people simply don't understand why plant growth lights are pinkish-violet, not green.
I teach art classes. People seem to get it.
And? I talk to non-art students. If you never have to think about it, most people won't. I promise you, there are plenty of "obvious" topics you are oblivious to and misunderstand. We all have them.
I don't teach art students, I teach one-off classes to teens and adults.
Really shitty ones are. High quality grow lights use full-spectrum lights including far-red and infrared, and are proven to be more effective than the so called "blurple" temu lights
And you can see sooo much of the infrared and ultraviolet part of the spectrum. What you see is still a kind of pinkish-violet.
By the way, no LED based light is "full spectrum". That is a common lie. Growth lights have violet-blue LEDs in the 200-400nm range, and red ones in the 600-800nm range.
If you do a spectrum analysis of any LED light, you will see distinctive, narrow peaks around the LEDs core frequencies, usually with a bandwidth of 12-40nm.
For absortion ranges of Chlorophyll A and B, see for example https://www.mpsd.mpg.de/17628/2015-04-chlorophyll-rubio
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.
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.
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.
Yes, just like all plants on earth are yellow.
The sun isn't exactly yellow
If you want to split up the emission spectrum, a red dwarf isn't exactly red, either.
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.
The tone in which you read is up to you.
That aside, if the sun were yellow, we wouldn't see other colors than yellow.
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.
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?
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.
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?
I don't know what your argument is anymore. I was arguing that plants growing under a red dwarf wouldn't necessarily be red.
Edit: We have a yellow sun.
My argument is what I wrote, so read that and you'll know.
Did you check out the link I sent you? Our sun does not emit only yellow light. You're thinking of the classification "yellow star", perhaps. But look at the emission spectrum that you yourself spoke of:
Maybe go back and re-read my comment and following explanation of why I made my comment. I just told you about emission spectrums, I don't need it explained back to me.
Feel free to respond but it feels like I'm talking to a wall here. I'm done.
Excuse me, but same feeling here.
You bring up the argument of emission spectrums, and I'm bringing up as a counterargument and using it against your argument, because it makes even more sense in favor of what I'm saying
that our plants wouldn't look yellow here because the sun doesn't just emit yellow light. Your very first point just doesn't make sense. Our sun is a "yellow star" as a classification but it doesn't emit only yellow light. It emits light filling a spectrum even wider than human vision is able to view. Are you even paying attention and following along your own point? Honestly, my Good Person...
And. Neither. Does. A. Red. Dwarf. Emit. Only. Red. Light.
It's like you completely forget the point I was making to go on some tangent. Yes, we have a yellow sun because it turns out the colours we call things are based on how we see. Next up we'll learn how sounds are described based on how we hear. Wait until you learn about the other senses we use to learn and communicate about our environment.
Just like we call plants green.
I guess we'll just agree to agree then. Seems like we're making the same points in the end.
gg, have a good one. 🤝
Yeah, it's more green.
and plants become darker green if they are partially or almost fully shaded.
In other news, the sun is hot!
The sun is not a place where we could live
Everything on it is a gas
I'd almost say the same about the Earth, recently
Sure, but that's not a TMBG song :P
Had to look them up, I'm not familiar. And I won't be after the song I heard 😒
If the song you listened to was "Why Does the Sun Shine," you should know they didn't actually write that one (it's from a 50's educational record they liked as kids) and it's not very representative of their ouvre. They've even released a follow-up track ("Why does the sun really shine?") which corrects a lot of that one. It starts with the line "The sun is a miasma of incandescent plasma, the sun's not simply made out of gas, no no!"
Fantastic band from the 90's, also responsible for The music of Mickey Mouse Clubhouse.
I don't think we got that show in my country but I could be mistaken.
No shame! Even if you had, and English wasn't the primary language, it's possible that localization would have changed the music.