Obligatory xkcd: "Sky Color" https://m.xkcd.com/1145/
Obligatory xkcd[2]: "Rayleigh Scattering" https://m.xkcd.com/1818/
Others?
Obligatory xkcd[2]: "Rayleigh Scattering" https://m.xkcd.com/1818/
Others?
The liquid air article on wikipedia doesn't have any photos.
Air is blue. The reason air is blue is blah blah blah physics, see the article we're all commenting on, but at the end of the day air is blue. We don't demand the same elaborate physics questions for why a ripe banana peel is yellow.
Looking at a periodic table makes this pattern kinda clear.
The sky is not blue for the same reasons that a banana is yellow.
But the reasons behind color in both cases is interesting regardless.
The reason a banana peel is yellow is that in a lit environment, it makes yellow light hit your eye.
The reason air is blue, is that in a lit environment, it makes blue light hit your eye.
Obviously one can go further to deeper reasons. Go deep enough and no different colors have the same reason. But you not understanding the level of abstraction in use doesn't make me wrong.