why is the sky blue?

Answer 1

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colors because the blue light has been scattered out and away from the line of sight.

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

In the evening, the sky sometimes looks orange or red because of air pollution. Dust and other floating particles in the air act as a filter on the sunlight. When the sun is low the air layer is thicker and the light is more filtered, so it looks yellow, orange and finally red.

http://www.sciencemadesimple.com/sky_blue.html

Light of a particular color is determined by its frequency. The higher the frequency, the more blue it appears.

Sunlight is made up of many frequencies that when mixed together produce white light. You may have seen a rainbow or the prism experiment where the white light is split up into several colors (frequencies).

The earth's atmosphere is filled with minute dust particles that act like a filter, scattering the light rays. The rays of light with the longer wavelengths, such as reds and yellows, tend to travel more easily through the atmosphere, while the rays with the shorter wavelengths, like blues and indigos, tend to be dispersed more easily. These more easily dispersed shorter light rays are what give the sky its blue color.

Incidentally, red skies at sunrise and sunset are caused by the same phenomenon. When the light hits the Earth at an angle it has more of the atmosphere to go through; this increases the filtering effect and that is why you see a red sky.

Answer 2

The sky appears blue because air scatters short-wavelength light in preference to longer wavelengths. When we look toward a part of the sky not near the sun, the blue color we see is blue light waves scattered down toward us from the white sunlight passing through the air overhead. Near sunrise and sunset, most of the light we see comes in nearly tangent to the Earth's surface, so that the light's path through the atmosphere is so long that much of the blue and even yellow light is scattered out, leaving the sun rays and the clouds it illuminates red.

Answer 3

It's blue b/c the earth is made mostly of water/ oceans and so the color of the water reflects off the sky and shows up blue.

Answer 4

the refraction of light coming through the atmosphere makes the sky appear blue to us

Answer 5

Because the blue colour in the sun's rays are scattered more than the other colours by the atmosphere without much absorption.

Answer 6

Refraction

Answer 7

cause it makes people horny

Answer 8

I guess there is water up there idk