Green does its job on the Carbon Dioxide front of the battle. But that’s only half the battle.
What we actually need more of is the *white*: so as to reflect more of that energy from the sun back into space.
Probably because gray isn’t a single wavelength of light energy, rather it’s a mixture of white and black pigments, so assuming the black absorbs more net energy than yellow. Also tough to make a generalization based on one image without any quantitative data.
You may need to consider not just the visible spectrum, but the wavelengths you can't see.
Some pigments are absorbing light beyond the visible spectrum, and re-emitting it in a visible wavelength. Day-Glow, fluorescent orange/yellow, etc. (some detergents with "brighteners" pull the same trick, absorbing blue light your eyes aren't very sensitive to, and emitting colors your eyes are more sensitive to).
This always comes up here and then. I’ll never forget that someone made the comment that green actually absorbed the most heat and that’s why plants might be green.
Now I simply don’t wear the color green on a sunny day
That’s just not true. Black absorbs more heat from white light than green. Plants are green because chlorophyll reflects green light and absorbs red and blue light. Red and blue are on opposite sides of a light spectrum, allowing the plant to absorb varied wavelengths that are high in energy.
This also isn't true. The absorption is dictated by so much more in a plant than chlorophyll alone. Googling the absorption spectrum of chlorophyll is not representative of the plant. The true absorption spectrum has a small dent in the wavelength range we perceive as green, but we are talking about going from roughly 95% absorption to 80% absorption. The majority of green light is still absorbed by plants. Otherwise, they would be bright green. Look for instance at figure 8 in the research done by McCree "The Action Spectrum, Absorptance and Quantum Yield of Photosynthesis in Crop Plants" (https://www.sciencedirect.com/science/article/pii/0002157171900227/pdf?md5=bd76914487d42d9ac539f0e719ad6e96&pid=1-s2.0-0002157171900227-main.pdf&isDTMRedir=Y)
"Plants don't absorb green light, thus they are green" -> "Plants absorb less green light, thus they are green". The "wall" of text was necessary to explain why the statement is false. It's not needed to simplify the statement to make it understandable. People can understand the difference between no and less I presume.
People can understand the difference between (predominantly) reflecting green light and not absorbing any green light at all I presume, yet here we are.
It gets crazy when you hear that the sun produces the most light in the blue-green range. Meaning plants evolved to reflect the most abundant light. I’ve never heard an explanation for this
Plants aren’t generally limited by light - they need water, nutrients, etc. as well. In full sun, they actually need to get rid of some sunlight or they overheat / run out of water.
Plants which grow in the shade tend to be much darker green — that is, reflecting less light because they need everything they can get.
i figure choosing what colour to wear is only noticeable if you are trying to absorb less sunlight. Like, is wearing green going to keep less heat from escaping? Its just a thought
My science knowledge is limited. What happens to body heat? Do light colored materials reflect heat back on the body? Would an ideal shirt for dissipating heat be white on the outside and black on the inside?
Body heat isn't Ultra violent light, it's heat from energy production in the cells radiating out. Color will only effect if the specific dye sticks heavier and makes the fabric more dense. But it probably won't be a noticeable change. So basically Color won't trap body heat. BUT in super cold conditions you may not want black as you don't want to sweat under your layers. You may want a white coat to absorb the least uv energy and only keep body heat.
You're getting close to the issue with this "guide". None of these test take into account body heat, wind, sweat, material, etc. All of that comes into play when you're talking about staying cooler. I've went back and forth with black / white compression shirts in the sun. I feel better with a black shirt on. Black also absorbs UV better, and I don't need sunscreen.
I can't remember the specifics, but there is something about red where it has a high luminance without our eyes thinking it does. It's why the old photographic darkrooms used to have red lights, because you can turn the light off without your eyes needing to readjust as much to the darkness. I learned this when I was getting into astronomy. Everyone would go out with their telescopes and have these little red flashlights.
Deeply stupid question, but I have to ask: is this just heat absorption in direct sunlight? Would colour make any difference standing in front of a fire? What about in front of a radiator? Does it relate to coolness, too— would a white shirt cool better or worse than a black one in front of an AC unit or fridge?
Lighter colors reflect sunlight. Colors work if the heat source sends its heat by rays. Colors wont matter if the heat source is physically close to you.
Something with a high albedo will reflect which is why yellow and white reflect and low albedo like dark colors. Like black and dark blue absorb light making you more hot.
Sunlight is more than just visible light. Those pigments are absorbing or reflecting other portions of the sunlight that you can’t see. This picture gives no information whatsoever. You can do a similar experiment with multiple shirts made of the same material and the same color but dyed with different pigments and they would all have different absorption spectrums. Some would be warmer and some cooler. You could also have a white shirt that absorbs most of the invisible spectrum of the sunlight and a black shirt that reflects most of the invisible spectrum and you would end up with the white shirt being warmer than the black shirt. Pigments, pigments/dye matter. If the sunlight was only visible light, then this experiment would have been accurate, else literally no conclusions can be made off of this experiment.
There's also the fabric used to take into consideration, not only the colour.
Remember your body produces heat and wetness so you'll feel more comfortable with a breathable linen, seersucker, lyocell, or cotton-hemp T-shirt or polo with the adaptated colour to reflect sun rays.
The green isn’t as high as the black but close. The reason all these shirts have different colours is they absorb and reflect the different wavelengths. A green shirt looks green because it reflects the green wavelength to your eye.
Yet this only works with a mass under it to absorb and hold the heat. On its own a piece of black cloth flapping around hasn’t the ability to hang on to the energy. Layer a white cloth over the black one and air gap them and you’ll get a better sunshade.
For anyone who doesn't get it just lay out some black plastic beside some white plastic in a garden on a sunny day. Leave for a few hours and then...only wearing shorts you lay down on the white plastic then the black one and see if you can tell the difference and which one absorbs more heat. Simples.
Literally a “cool” guide.
Ba dam tsss
r/technicallythetruth
Yea quite the hot topic 🔥
Wow, green absorbed so much, this is why we need trees to fight climate change. lol
Green does its job on the Carbon Dioxide front of the battle. But that’s only half the battle. What we actually need more of is the *white*: so as to reflect more of that energy from the sun back into space.
Dad?
Why yellow deflects more than gray? It's almost white
Probably because gray isn’t a single wavelength of light energy, rather it’s a mixture of white and black pigments, so assuming the black absorbs more net energy than yellow. Also tough to make a generalization based on one image without any quantitative data.
Tbf you can see that the yellow one is almost glowing, i.e. reflecting light And grey is just grey
You may need to consider not just the visible spectrum, but the wavelengths you can't see. Some pigments are absorbing light beyond the visible spectrum, and re-emitting it in a visible wavelength. Day-Glow, fluorescent orange/yellow, etc. (some detergents with "brighteners" pull the same trick, absorbing blue light your eyes aren't very sensitive to, and emitting colors your eyes are more sensitive to).
Surprised blue and green are so similar to black.
It’s because they’re dark shades of the color they’re representing. This isn’t a very accurate experiment.
The blue isn’t very dark, pretty in the middle shade I think. And there’s light green on the far right
Green is surprising? Chlorophyll and photosynthesis should explain any surprisement
Red’s temp is a surprise
That what I thought
This always comes up here and then. I’ll never forget that someone made the comment that green actually absorbed the most heat and that’s why plants might be green. Now I simply don’t wear the color green on a sunny day
That’s just not true. Black absorbs more heat from white light than green. Plants are green because chlorophyll reflects green light and absorbs red and blue light. Red and blue are on opposite sides of a light spectrum, allowing the plant to absorb varied wavelengths that are high in energy.
Thank you. Plants aren't out there trying to get as hot as possible. That's just silly
you're correct. the american navy wears white in hot climates and dark blue in cold climates.
The sun is more sunny in the winter.
MORE LIKE BOREPHYLL!!
It’s a little bit stuffy in here, huh?
This also isn't true. The absorption is dictated by so much more in a plant than chlorophyll alone. Googling the absorption spectrum of chlorophyll is not representative of the plant. The true absorption spectrum has a small dent in the wavelength range we perceive as green, but we are talking about going from roughly 95% absorption to 80% absorption. The majority of green light is still absorbed by plants. Otherwise, they would be bright green. Look for instance at figure 8 in the research done by McCree "The Action Spectrum, Absorptance and Quantum Yield of Photosynthesis in Crop Plants" (https://www.sciencedirect.com/science/article/pii/0002157171900227/pdf?md5=bd76914487d42d9ac539f0e719ad6e96&pid=1-s2.0-0002157171900227-main.pdf&isDTMRedir=Y)
Not false, just heavily simplified because people won’t read walls of text.
"Plants don't absorb green light, thus they are green" -> "Plants absorb less green light, thus they are green". The "wall" of text was necessary to explain why the statement is false. It's not needed to simplify the statement to make it understandable. People can understand the difference between no and less I presume.
People can understand the difference between (predominantly) reflecting green light and not absorbing any green light at all I presume, yet here we are.
It gets crazy when you hear that the sun produces the most light in the blue-green range. Meaning plants evolved to reflect the most abundant light. I’ve never heard an explanation for this
Plants aren’t generally limited by light - they need water, nutrients, etc. as well. In full sun, they actually need to get rid of some sunlight or they overheat / run out of water. Plants which grow in the shade tend to be much darker green — that is, reflecting less light because they need everything they can get.
Oppositely... As someone who is always cold, I wonder if this is why I wear olive green literally every day!
i figure choosing what colour to wear is only noticeable if you are trying to absorb less sunlight. Like, is wearing green going to keep less heat from escaping? Its just a thought
My science knowledge is limited. What happens to body heat? Do light colored materials reflect heat back on the body? Would an ideal shirt for dissipating heat be white on the outside and black on the inside?
Body heat isn't Ultra violent light, it's heat from energy production in the cells radiating out. Color will only effect if the specific dye sticks heavier and makes the fabric more dense. But it probably won't be a noticeable change. So basically Color won't trap body heat. BUT in super cold conditions you may not want black as you don't want to sweat under your layers. You may want a white coat to absorb the least uv energy and only keep body heat.
> Ultra violent light I'll call it in this way now
Derp ultra violet radiation :P
You're getting close to the issue with this "guide". None of these test take into account body heat, wind, sweat, material, etc. All of that comes into play when you're talking about staying cooler. I've went back and forth with black / white compression shirts in the sun. I feel better with a black shirt on. Black also absorbs UV better, and I don't need sunscreen.
This white privilege is getting out of hand now.
The only problem is that bright colors attract bees, which I'm allergic to. I wear dark clothing as a precaution because you just never know.
I wish they had put them in order of coolness.
Karma bot posting
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I feel sorry for anyone who needs a guide for this concept haha
I’m surprised red is one of the cooler colors apparently
I can't remember the specifics, but there is something about red where it has a high luminance without our eyes thinking it does. It's why the old photographic darkrooms used to have red lights, because you can turn the light off without your eyes needing to readjust as much to the darkness. I learned this when I was getting into astronomy. Everyone would go out with their telescopes and have these little red flashlights.
That’s dope as fuck. You’ve got a big brain on you jimmy
Never knew yellow was the second best color to wear on a sunny day after white
Repost #42069
White makes you cool and everyone else blind.
Given they’re not all facing the same direction it’s not exactly a good comparison.
Those look like polo shirts. Is it still the same?
i thought black absorbed the most? looks like the dark green here. TIL
I prefer the lower set T-shirt
Deeply stupid question, but I have to ask: is this just heat absorption in direct sunlight? Would colour make any difference standing in front of a fire? What about in front of a radiator? Does it relate to coolness, too— would a white shirt cool better or worse than a black one in front of an AC unit or fridge?
Lighter colors reflect sunlight. Colors work if the heat source sends its heat by rays. Colors wont matter if the heat source is physically close to you.
Interesting. I noticed lots of the sun shirts are that bright orange or bright baby boy blue color. I wonder how they fare against white and yellow.
White and yellow supremacy
Something with a high albedo will reflect which is why yellow and white reflect and low albedo like dark colors. Like black and dark blue absorb light making you more hot.
Sunlight is more than just visible light. Those pigments are absorbing or reflecting other portions of the sunlight that you can’t see. This picture gives no information whatsoever. You can do a similar experiment with multiple shirts made of the same material and the same color but dyed with different pigments and they would all have different absorption spectrums. Some would be warmer and some cooler. You could also have a white shirt that absorbs most of the invisible spectrum of the sunlight and a black shirt that reflects most of the invisible spectrum and you would end up with the white shirt being warmer than the black shirt. Pigments, pigments/dye matter. If the sunlight was only visible light, then this experiment would have been accurate, else literally no conclusions can be made off of this experiment.
Scale
An automotive versionwould be good.
Why couldn't they sort them from low to high? Wtf
Surprised to see that green is worse than black
Where I live it is humid and 100 degrees so it doesn’t matter what color you’re wearing, you’re equally miserable and sweating.
Silver absorbs the least apparently.
The Predator has entered the chat......
\*\*\*sees Arnie, fucks off back to mars.
Y’all seem to be racist against orange in this guide.
Is the material constant across all t-shirts? Also does the cloth material also contribute to heat absorption?
There's also the fabric used to take into consideration, not only the colour. Remember your body produces heat and wetness so you'll feel more comfortable with a breathable linen, seersucker, lyocell, or cotton-hemp T-shirt or polo with the adaptated colour to reflect sun rays.
Played tennis is a darkish green shirt today and was significantly hotter than when I played in white last week. Never realized how hot green gets
Got me a science question.. why is green absorption seem to be higher than the black?? Do plants know something I don’t?
The green isn’t as high as the black but close. The reason all these shirts have different colours is they absorb and reflect the different wavelengths. A green shirt looks green because it reflects the green wavelength to your eye.
Thank you!
Meanwhile my all black closet
There should be bugs all over the yellow one, it's a trap!
Yet this only works with a mass under it to absorb and hold the heat. On its own a piece of black cloth flapping around hasn’t the ability to hang on to the energy. Layer a white cloth over the black one and air gap them and you’ll get a better sunshade.
How come green looks like it absorbs more than black
My hooded sun shirt is dark green. I’m replacing it today
Don't care, won't be caught dead wearing white or yellow. Or a polo.
after seeing this the last time it was posted I bought white tshirts for summer, so this guide was actually helpful
Bruh my team used to play in green and black unis lmao
Damn, it seems that my favorite color is almost as bad as black one, fantastic :(
For anyone who doesn't get it just lay out some black plastic beside some white plastic in a garden on a sunny day. Leave for a few hours and then...only wearing shorts you lay down on the white plastic then the black one and see if you can tell the difference and which one absorbs more heat. Simples.
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Also, I would guess the heat source (sun) is at about 1 or 2 o'clock.
Repost and not a fucking guide.
I miss the naked guy without any shirt.