I don’t think this applies to all landscapes but many mountains appear blue from a distance. Shouldn’t they appear green and grey due to trees and rock?
In: Physics
Yes, it does apply to everything that you see at a distance, regardless of whether you’re looking at mountains or trees or buildings or a desert or whatever. It’s the same [reason why the sky is blue](https://www.youtube.com/watch?v=vNYef57huDE), which is that sky scatters out blue light. If you’re looking at something that’s 10km away, you’re looking at that object through 10km of air, i.e., there is 10km of air between you and whatever you’re looking at. It’s the same as looking at something 10km up in the sky.
Same reason the sky does. The scattering of blue light by isoprene in the atmosphere. You’re actually seeing part of the sky between you and the mountain. As you get closer there’s less air between you and the mountain to scatter the light so the mountain’s true colors are more evident.
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