Why is the sky blue?

Answer 1

I don't know, but I know what is greater than god, what rhymes with orange, and where the other dollar went.

What I really want to know is, "Why are some people's brains empty?"

Maybe some of these people know.

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Answer 2

The first thing to recognize is that the sun is an extremely bright source of light -- much brighter than the moon. The second thing to recognize is that the atoms of nitrogen and oxygen in the atmosphere have an effect on the sunlight that passes through them.

There is a physical phenomenon called Rayleigh scattering that causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere, the color blue is scattered much more efficiently than the other colors.

So when you look at the sky on a clear day, you can see the sun as a bright disk. The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you. (Because red light, yellow light, green light and the other colors aren't scattered nearly as well, you see the sky as blue.)

Answer 3

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.

Theres a diagram on the link below to help you understand

Answer 4

The sky seems blue because of the sun. Technically the sky is black, but the suns brightness of -23(very bright for apperant magnitude) gives it a light blue color.

Answer 5

Sky is not blue in colour , it appears blue due to the scattering of the light in the atmosphere of the earth, its actual colour is black.

Answer 6

light is made up of all colors. When all colors are combined they are white. The Earth's atmosphere acts like a prism and breaks up the white light into its component colors. Blue being the most visible.

Answer 7

The colour of a body is known from the colour of light it reflects (or emits). Usually cold body emits bluer lights with shorter wave lengths and hot body emit red lights with longer wave lengths. This indicate that clouds are extremely cold bodies reflecting bluish light of sun. Hence we see it as blue.

Answer 8

Because the average human eye is engineered in such a way to look up and see the color generally referred to as "blue."

Answer 9

http://en.wikipedia.org/wiki/Sky#Sky_luminance_and_colors