181–190 of 226 posts
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Nope. If the bag looks blue that means it's scattering away blue light while letting the rest through. So it's filtering (out) the blue. OP is right.
If you see blue on BOTH the outside of the bag and the inside, what does that mean? I’ve never thought of this.
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A blue plastic bag filters most of the spectrum EXCEPT the blue part. Not the other way around. Simple proof: look inside, the light is blue. I guess the biggest problem for the plant here is that especially the infrared part of the sunlight is very important. Yellow leaves usually mean not enough light. Especially tomatoes need lots of sunlight.
Nope. If the bag looks blue that means it's scattering away blue light while letting the rest through. So it's filtering (out) the blue. OP is right.
Not just crops and power. I know a guy whose startup is using transparent solar panels in Germany on eco-friendly buildings with grass on roofs, to get power and eco-cooling, as well as Oxygen production - at least that is how he explained it. The concept is called green-roofs. Unfortunately I don't remember his startup's name. A link with details about the concept, minus the use of transparent solar panels: https://…
The oxygen claim doesn't inspire confidence. Plants don't produce any useful amount of oxygen, and real scientists know that.
Could you please add some context to this statement. It is hard to believe that the oxygen produced by plants is so negligible as to be useless. Why?
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All of my plants this year have gotten blossom rot, pretty much too late to fix too. No tomatoes for me this year.
Blossom end rot is caused by calcium deficiency. Easiest solution for this is to just crush up egg shells and put them in and on top of the soil. I save my eggshells in a jar in the fridge for a few months prior to planting. It may be too late for this year but should work wonders for you in the future.
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So what on this earth is producing useful amounts of oxygen then?
Algae in the ocean, mostly. But also, any growing plants - you could compute for every kg of dry plant matter, how much oxygen is released, as the dry plant matter is almost entirely carbon produced from breaking up CO2. So unless you're collecting tens or hundreds of kilograms of dead plants from your roof every year, it isn't producing much oxygen.
My mother ayed tomatoes in the spring when it was still cool. She covered them with clear plastic bags as she always has. But she needed one more bag so she used a blue recycling bag on one of the plants. Blue tinged really it's almost clear. I pointed out to her one of the plants had yellow leaves. It was the plant with the blue bag. Later in the summer the blue bag plant produced fruit just like the other plants. B…
That slight colour blockage, or the tint those solar panels have is helpful. There are two reasons. One, plants grow better under red light. Red light has the highest efficiency for photosynthesis in plants, that why LED grow lights are tuned for certain wavelengths. Plants use blue light to know what direction to grow. And for a certain category of tints or dyes that are fluorescent, additional red light. Luminescen…
Earlier quoted context omitted.
Nope. If the bag looks blue that means it's scattering away blue light while letting the rest through. So it's filtering (out) the blue. OP is right.
If you see blue on BOTH the outside of the bag and the inside, what does that mean? I’ve never thought of this.
Earlier quoted context omitted.
Nope. If the bag looks blue that means it's scattering away blue light while letting the rest through. So it's filtering (out) the blue. OP is right.
No, a blue filter, like a blue plastic bag would let blue pass and absorbe the other colors. That's why if you shine a white light through a blue filter, things look blue on the other side. Now, some of the blue light is scattered away, and that's why you see the plastic bag itself as blue.
Earlier quoted context omitted.
Nope. If the bag looks blue that means it's scattering away blue light while letting the rest through. So it's filtering (out) the blue. OP is right.
No, a blue filter, like a blue plastic bag would let blue pass and absorbe the other colors. That's why if you shine a white light through a blue filter, things look blue on the other side. Now, some of the blue light is scattered away, and that's why you see the plastic bag itself as blue.