why is the sky blue?

Answer 1

why are you a human?
that shouldn't be a question

Answer 2

the effect is called Rayleigh Scattering by physicists. Basically air molecules in the atmosphere refract more blue light than red, making the sky appear blue. When the sun is close to the horizon, dusk or dawn, we see more red light because most of the blue light is refracted out of our line of sight at that low angle of the sun. hope this helps! and wow the first poster is so WRONG! go back to school and learn to spell knowledge correctly!!!

Answer 3

It is blue because the oxygen in the atmosphere reflect the blue rays of the sun in such a way that we see them. As the sun rises or sets, we see more red, since the longer waves of the spectrum are the ones that make it through the greater amount of atmosphere through which we look when the sun is low on the horizon.

Answer 4

Because the atmosphere filters out most colors other than blue. The sun's rays have to pass through a thick atmosphere when it is overhead.

When the sun "sets", it is at a much lower angle, with much less atmosphere to pass through, and that's how all the reds get in, thus a red sunset. When it's higher, the reds get filtered out.

Answer 5

Blue light has the shortest wavelength and is scattered the most when it passes through the atmosphere.

Answer 6

Beach Bum has got it right, its Rayleigh scattering. Same with deep water. Also thick glass (go look at the bathroom mirror edgewise).

Answer 7

there is a particular substance that contributes to the blue colour as well as the reflection of the seas

Answer 8

http://www.math.ucr.edu/home/baez/physics/General/BlueSky/blue_sky.html

http://hyperphysics.phy-astr.gsu.edu/hbase/atmos/blusky.html