the_architect
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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. |
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Fancy You
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There have been about 400 people on Y! Answers who have asked this question. Not too original. Maybe you can do a search (to the left on the answer page) before you ask a question to see if it has already been asked.
http://answers.yahoo.com/search/search_result;_ylt=Am4r1DoQoR5Hj.0FdZnnuKTzy6IX?p=sky+blue |
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Saltbreaker
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another rhetorical question, let me give you another question...why do birds fly? |
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rockhead515
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What color would you prefer? |
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cutebrownwow
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who knew watching PBS kids from the show auther would answer this question, the sky is blue because air particles reflect blue light |
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demigod
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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. |
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badusha
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THAT IS THE COLOUR OF SKY |
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ravi
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The sky is (roughly) that part of the atmosphere or of outer space visible from the surface of the earth (or any other planet; see Skies of other planets). Birds, airplanes, and kites are often considered to fly in the sky. It is difficult to define precisely for several reasons. During daylight the sky has the appearance of an opaque blue surface, but this is the result of the air scattering sunlight. There is no "blue object" above the earth in any normal sense, so it is hard to say what object the sky is. The sky is thus sometimes defined as the denser gaseous zone of a planet's atmosphere. At night the sky has the appearance of a black surface or region scattered with stars. But if we then say that the sky is the entire visible universe, it would not be the same thing we see during the day. The color of the sky is a result of diffuse sky radiation. On a sunny day the Earth sky usually looks as a blue gradient - dark in the zenith, light near the horizon (due to Rayleigh scattering). It turns orange and red during sunrise and sunset, and becomes black at night. |
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mortician
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why is the grass green? |
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Gangsta Penguin
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because when sunlight comes through the atmosphere it refracts off the water particles in the air thus making the sky blue. |
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Travie
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cause as light comes throught he atmosphere it refracts (bounces around) off particles in the air and blue is the easiest/most likely to hit these particles and therefore blue come from more directions and things look more blue. |
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jayhawk03
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Just because |
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