Why is the color of the sky blue ?

[Santosh MY]

Can anyone give me the appropiate answer?

[Anil]

OK, scientific explanation first:
The blue color of the sky is due to a phenomenon called Rayleigh scattering. As light passes through the atmosphere, most of the longer wavelengths pass straight through. Only a 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 therefore looks blue. <br><br>

And a poetic one:<br>
Why the Sky is Blue, a Poem by John Ciardi <br><br>

I don\'t suppose you happen to know <br>
Why the sky is blue? It\'s because the snow <br>
Takes out the white. That leaves it clean <br>
For the trees and grass to take out the green.<br>
Then pears and bananas start to mellow, <br>
And bit by bit they take out the yellow. <br>
The sunsets, of course, take out the red <br>
And pour it into the ocean bed <br>
Or behind the mountains in the west. <br>
You take all that out and the rest <br>
Couldn\'t be anything else but blue. <br>
Look for yourself. You can see it\'s true.