Chemical Forums

Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: aqhl on October 18, 2006, 04:53:23 PM

Title: Why is they sky blue?
Post by: aqhl on October 18, 2006, 04:53:23 PM

In my country, the sky is clearly blue in autumn. Someone can explain me why ?

Title: Re: Bluesky
Post by: Yggdrasil on October 18, 2006, 06:14:41 PM

Basically, the sky is blue because blue light has a shorter wavelenght than red light and is scattered more easily.  For a more detailed explanation, see

http://www.sciencemadesimple.com/sky_blue.html

or just google "why is the sky blue?"

Title: Re: Bluesky
Post by: pantone159 on October 19, 2006, 12:25:17 AM

Ozone absorption also contributes to the blue color, specifically the very vivid blue colors that I usually notice around twilight.

Rayleigh scattering only produces a pale blue color, the more vivid hues need the ozone absorption to get there.