Did you know? (in Off-topic)


48Zach October 10 2006 7:25 PM EDT

Do you think you know why the sky is blue? If not, here is the answer :D

The sun's rays hit the Earth's atmosphere, where the light is scattered by nitrogen and oxygen molecules in the air. The blue wavelength of this light is affected more than the red and green wavelengths, causing the surrounding air to appear blue. At sunset, the sun's light passes farther through the atmosphere, deflecting and decreasing the blue in the air. Scattering by dust particles and pollution in the air causes the sunset to appear red.

I had to write this in an essay.. Can anyone tell me if there is any spelling mistakes in it?

Adminedyit October 10 2006 7:45 PM EDT

the spell checker didn't point any out...

Stephen October 11 2006 2:10 AM EDT

So if the shorter wavelengths are scattered then why isn't the sky violet, which is shorter than blue and therefore would be scattered more?

AdminShade October 11 2006 2:37 AM EDT

violet wavelengths are too short, they aren't scattered in such a way as to produce that effect.

Stephen October 11 2006 2:59 AM EDT

And in the evening, if more blue is scattered as the light travels further, why isn't there a time when the sky is green before it turns red?

Thrasher October 11 2006 1:00 PM EDT

Now that would be cool.

Godpanda October 11 2006 2:14 PM EDT

If the earth was 70% ground and 30% ocean... would it still be blue?

Seriously... would it?

PirateKing October 11 2006 2:16 PM EDT

Yes it would. The color is the result of light rays being affected by their passage through the atmosphere, not the amount of land or water covering the surface.

Godpanda October 11 2006 2:23 PM EDT

Oh? So if there was no water it would still be clue?

Seriously, I always wondered about this.

Admin{CB1}Slayer333 October 11 2006 2:43 PM EDT

And in the evening, if more blue is scattered as the light travels further, why isn't there a time when the sky is green before it turns red?

There is, it happens very quickly and the sun has to be _very_ low to be seen, there is a restaurant in Florida, forget which island it is on, where you can see it at sundown called the Green Flash.

Stephen Young October 11 2006 2:49 PM EDT

Wow. A green sky. didn't know that.

PirateKing October 11 2006 2:50 PM EDT

But the green flash phenomenon is restricted to pretty much the sun, not the entire sky.

http://en.wikipedia.org/wiki/Green_flash

and

http://mintaka.sdsu.edu/GF/
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