Why is the sky blue? I'm mean really why is the sky the colour blue?

Answer 1

It is because blue light from the sun strikes the air molecules and scatters and our eyes perceive it as blue.
Transmitted light (from the sun, light bulbs, fire, etc) is made up of a spectrum of colors. The longest wavelengths of light are on the red end of the spectrum and the shortest wavelengths are on the blue/violet end of the spectrum.
When transmitted light such as sunlight enters our atmosphere it collides with the oxygen and nitrogen atoms. The color with the shorter wavelength is scattered more by this collision. Because violet and blue are the shortest wavelengths the sky appears to be violet / blue. But because our eyes are more sensitive to blue light than they are violet light, we perceive the sky as blue.

Our eyes contain thousand of rods and cones, which are the receptors for light. Whenever one of the 3 Stooges pokes you in the eye you see a giant blue spot. This is because the blue receptors have been activated. Blue is one of the primary colors and thus more easily activated and seen by our eyes.

blue is the color of the K-mart special, so this color isn't all bad.

Answer 2

The sky is blue, because the light from the sun, come thought the atmosphere, and most of that light reflected back, But is split in different pail colours, the blue colour is the one colour human eyes can pick-up the most, their for the sky is blue because we see it as blue.

Answer 3

The sky is blue because of all the water vapor in the air. Most colors (or wavelengths of light) go through air unaffected, but blue is scattered the most creating an ambient blue color in the sky. This is the same reason if you have ever seen pictures of icebergs or glaciers with puddles in them that those puddles are a deep blue. It's all about refraction of light by water.

Answer 4

The white light from the sun is a mixture of all colours of the rainbow. 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.
The three different types of colour receptors in the retina of the human eye respond most strongly to red, green and blue wavelengths, giving us our colour vision.

Answer 5

The sky appears blue (instead of black) because light passing through the air hits tiny particles like dust and pollen. These tiny particles are large enough to reflect blue light, but red light (which has a longer wavelength) is not reflected nearly as much. So the result is that the blue light gets scattered by the particles, and you see it when you look up

Source:

http://www.why-is-the-sky-blue.org/why-is-the-sky-blue.html

Answer 6

Since approximately 70 percent of the earth is ocean, it is the reflecting light from the enormous body of water that makes the sky blue on a clear day.

Answer 7

When sunlight hits the Earth's atmosphere, it bends it like a prism into it's separate colors. The color red goes off into space (which is why the moon looks red during an eclipse - that light is hitting it). The blue just happens to be the color that bends down to where we can see. During sunset, the sky changes for the same reason, the angle the rays hitting the atmosphere changes and thus so do the colors we see.

Answer 8

In the color spectrum, blue has really short wavelengths, meaning extremely energetic, so when the sun's rays go through the atmosphere, except during sunset and sunrise, the only wavelengths that excite molecules in the air and are scattered toward us are blue (which humans can see) and ultraviolet.

Answer 9

Because the oxygen and nitrogen molecules reflect the blue color the most

Answer 10

the sky is blue because thats the color of space when it brightens. thats the real answer (my mom is a scientist thats how i know its real)