F

Why is the sky blue?

10 Answers
I've been think of that question the whole day. I just need a short answer! thanks
A

The blue color of the sky is a consequence of Rayleigh scattering (basically light is bouncing of things it interacts with that have a size approximating its wavelength) of light as it progresses through the atmosphere. Longer wavelengths of light (longer wavelength means lower energy) like the red, orange and yellow parts of the visible spectrum are largely unaffected and pass through the atmosphere.

The other colors of the visible spectrum (green, blue and purple) are more susceptible to being scattered because the shorter wavelength of this higher energy light is more likely to be scattered, and as a result blue light is scattered in all directions, so that when we look at the sky it appears to be blue.

As you look closer to the horizon, the sky appears much paler in color. To reach your eye, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light is then left to reach your eyes. The color of the sky near the horizon appears paler or white

...
A

The sky appears to be blue because of the effect called the Rayleigh effect. The light reaching the earth's atmosphere from the sun contains light of all colors. The molecules of gases and water vapor in the atmosphere are only able to absorb the light of blue color. The light of all other colors passes almost straight through the atmosphere. It does not get scattered in the atmosphere. The blue light absorbed by the molecules of air gets scattered in all directions. This is because once the molecules absorb the blue light, then release it back in the atmosphere in different directions thereby causing it to reflect throughout the atmosphere. Since blue light gets scattered more than any other light in the atmosphere, therefore it appears to be blue in color.

...
A

Light from the Sun hits the atmosphere. The short wavelength light (blue end of the spectrum) is scattered by molecules of gas in the atmosphere, while the long wavelength light is not as scattered. So if you look directly at the Sun as it sets, it tends to look red, while the sky is lit up be scattered light and looks blue.

...
R

The sky is blue because we only see blue light waves above us (thinner amount of atmosphere above)...

As the sun rises or falls it shines through a much thicker distance of atmosphere, and the red light waves (much longer waves) will appear to our eyes.

...
C

Why is the sky blue is a two part question.
First part is "Why?". Why is a question man has been trying to answer since his creation.
The second part is "Is the sky blue?" and the answer is
Yes the sky is blue. : )

...
H

If the sky is red, I will run 100 miles and back and again until it changes color. It's a good question and I think the explanation by Astute35 looks pretty good.

...
S

Sky is blue because violet colour has the minimum wavelength and maximum frequency.

This makes it highly dispersed in the sky and hence sky appears blue.

...
S

Sunrays scatters giving the blue light of the sky out from the color of the sunrays

...
J

It is blue because of the way light reflects through the earth's atmosphere.

...
F

It answers my question!

...