Why is the sky blue?

Answer 1

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.

Answer 2

Some sunlight hits the Earth directly. Some sunlight misses the Earth completely. Some sunlight grazes through the Earth's atmosphere like a near miss. This last type gets refracted very similar to light going through a prism. The blue component of sunlight (sunlight has all colours) is refracted more than red (That's why fog lights are orange) and the direction of refraction is towards the air/Earth. So more blue light is bent down while the red light just mozzies on by. All this blue light coming down makes the sky look blue.

Answer 3

It hasd to do with the bonding angle of nitrogen. When 2 atoms of nitrogen bond together to form a molecule of N2 (which is how nitrogen is usually found) it preferentially refracts light in the 420 to 430 nm wavelength range (blue)

HTH

Doug

Answer 4

Scattering of light. See the link.

Answer 5

The sky is bllue, because it's just a reflection from the ocean. Simple