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Name: William
Status: student
Age: 16
Location: N/A
Country: N/A
Date: 2001-2002

What are the different shades of blue of the sky?

Hi, William !!!

As you know, the sun emits the solar spectrum, which consists of a continuous distribution of all the electromagnetic waves. When such range of wave lengths reach the atmosphere, a part of the spectrum is diffused, specially that part that has wave length compatible with the atmospheric substances. It happens than, consequently, that the sky seems to us "blue", because of that diffusion process. Depending on the dust content on air, humidity content, and several other conditions, the "blue" may be deeper or not in the sky. And that is why you see different shades of blue.

Alcir Grohmann

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