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

On a clear sunny day, the sky above us looks bright blue. In the evening, the sunset puts on a brilliant show of reds, pinks and oranges. Why is the sky blue? What makes the sunset red?

To answer these questions, we must learn about light, and the Earth's atmosphere.



THE ATMOSPHERE
The atmosphere is the mixture of gas molecules and other materials surrounding the earth. It is made mostly of the gases nitrogen (78%), and oxygen (21%). Argon gas and water (in the form of vapor, droplets and ice crystals) are the next most common things. There are also small amounts of other gases, plus many small solid particles, like dust, soot and ashes, pollen, and salt from the oceans.

The composition of the atmosphere varies, depending on your location, the weather, and many other things. There may be more water in the air after a rainstorm, or near the ocean. Volcanoes can put large amounts of dust particles high into the atmosphere. Pollution can add different gases or dust and soot.

The atmosphere is densest (thickest) at the bottom, near the Earth. It gradually thins out as you go higher and higher up. There is no sharp break between the atmosphere and space.


WHY IS THE SKY BLUE?
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.

THE BLACK SKY AND WHITE SUN
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.

Also, out in space, the sky looks dark and black, instead of blue. This is because there is no atmosphere. There is no scattered light to reach your eyes.


sky appears red, pink or orange.

Answer 3

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.

Answer 4

Its not, actually it doesnt have a color. The blue color you see has many theories. One of the big ones is the reflection of water around the world. Thats why at night the sky isnt blue, because there isnt enough light to make a reflection and it turns orange because the sun overtakes it.

Answer 5

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.

Answer 6

The scattering of blue light also applies to starlight. Stars emit light that is more-or-less white. The space between the stars isn't empty; it's filled with gas and dust. This "interstellar medium" is about 20% of our galaxy's mass. When starlight passes through this gas, the blue photons are a bit more likely to be scattered than the red ones, so relatively more red light reaches us. This effect is called "reddening" (it is completely different from Doppler redshift).

Astrophysicts compare the reddened starlight to what we think stars are emitting and use that info to derive information about the properties of the interstellar medium.

Answer 7

Because blue light waves are the first to disperse in the atmosphere. Then the orange-red so when light has to cross more atmosphere (ie. sunrise or sunset) the sky seems orange redish.

Answer 8

because all Krypts go to heaven? JUST KIDDING-Because the accumulation of air and the light deflecting on it...same with snow...It's really blue but the human eye can only see white

Answer 9

The effect of the sun bouncing off my Big Blues!

Answer 10

it's not really blue....it's clear. Our eyes see the colors as they bounce around and back to us. grab some sky and tell me it's really blue....you know for yourself it is not.

Answer 11

Because it is the way that the blue color hits the Earths atmosphere