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

To start of with we must understand what light is.

Light isnt just made up of 1 colour, it contains a number of different colours each of which has a different wavelength. Light is split up into the following colours with the first having the longest wavelenght and the last having the shortest.

Red
Orange
Yellow
Green
Blue
Indico
Violet

An easy way to rememeber this is ROY G BIV (my year 12 geology teacher taught me that about 8 years ago)

As light moves through the atmosphere, most of the longer wavelengths are able to 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 in the atmosphere which is mainly nitrogen (78%) and oxygen (21%). The absorbed blue light is then scattered in all different directions. Since you see the blue light from everywhere overhead, the sky looks blue.

On Earth, the sun appears yellow. If you were out in space, or on the moon, the sun would look white. In space, there is no atmosphere to scatter the sun's light. On Earth, some of the shorter wavelength light (the blues and violets) are removed from the direct rays of the sun by scattering. The remaining colors together appear yellow.

You didnt ask about sunsets, but what the heck :)

What happens during sunsets is that as the sun begins to go down, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected and scattered. As less light reaches you directly, the sun appears less bright. The color of the sun itself appears to change, first to orange and then to red. This is because even more of the short wavelength blues and greens are now scattered. Only the longer wavelengths are left in the direct beam that reaches your eyes.

Answer 3

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.) The sun is an extremely bright source of light and 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.

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.

The white light from the sun is a mixture of all colours of the rainbow. This was demonstrated by Isaac Newton, who used a prism to separate the different colours and so form a spectrum. The colours of light are distinguished by their different wavelengths. The visible part of the spectrum ranges from red light with a wavelength of about 720 nm, to violet with a wavelength of about 380 nm, with orange, yellow, green, blue and indigo between. 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 is blue because of all of the gases in the atmosphere. when the gases mix together they look blue

Answer 6

The answer is rather complex, but it's due essentially to a scientific phenomenon known as the Tyndall Effect. Here's a link to a website to explain it to you.

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

Answer 7

Due to the molecules etc, absorbing all other colurs and reflecting blue light.

Answer 8

the atmosphere makes the black deep space look blue

Answer 9

Because the sea is green

Answer 10

Because if it were green we wouldn't know when to stop mowing the lawn.

Answer 11

why don't you pay attention in school if you did you would know the answer