/sci/ - Science & Math

>>15078043
Completely false lol.
Greenhouses work through light-energy conversion.
Visible light (red blue yellow etc) pierces through the glass, like a knife through butter.
It hits the inside space and gets absorbed as energy. (The efficiency of light absorption depends on the material.)
This energy is then looks for a way to escape on the path of least resistance, as energy does.
So (a portion) transfers into infrared and a portion as heat.
The infrared is then bounced back to the glass, but the glass doesn’t let infrared through as easily as visible light, so the path of least resistance is to convert the remaining infrared to heat.

Basically it filters down the ways energy can try to escape until it all arrives at heat and stays contained.
>What about infrared from the sun?
You already have that outside the greenhouse, you’re trying to collect and store a bunch (more) with the greenhouse.