why is the sky blue?

Answer 1

Einstein answered this question. It has to do with the way sunlight is scattered by the molecules in the atmosphere. Blue light scatters more than red (Tyndall effect also known as Rayleigh scattering), so more blue light reaches our eye.

There is an excellent description at the website listed below (look at the cartoon and it will be pretty clear).

It is not a reflection from the ocean. And it isn't just water molecules that cause the effect.

Aloha

Answer 2

The sky is blue because the light from our sun is filtered by the gases that make up our atmosphere and some bounce away as light does and what left is blue.

Or

The sky is blue because each night as we sleep little gnomes fly around painting the sky ready for the morning

Answer 3

The sun's rays hit the earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. If you notice, at sunset, when the light passes farther through the atmosphere, it bounces of of dust particles and pollution and causes the sky to appear red.

Answer 4

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 colours because the blue light has been scattered out and away from the line of sight.

Answer 5

Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.

Answer 6

I can see clearly now the rain has gone there are no obstacles in my way, look all around nothing but blue Sky's, because the clouds shift silly.

Answer 7

Scattering of sunlight by water droplets in the atmosphere. As blue light is scattered the most we see the sky as blue.

Answer 8

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.
As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

Answer 9

Because the color "blue" is the human adjective that we use to describe the sky. You could make up your own term and you would be just as right.

Technically: the spectrum and the atmosphere let in the kind of light that determines the color of our sky.

Answer 10

The water droplets in the atmosphere reflect the blue end of the spectrum.