why is the sky blue?

Answer 1

Einstein answered this question. It has to do with the way sunlight is scattered by the molecules in the atmosphere. Blue light scatters more than red (Tyndall effect also known as Rayleigh scattering), so more blue light reaches our eye.

There is an excellent description at the website listed below (look at the cartoon and it will be pretty clear).

It is not a reflection from the ocean. And it isn't just water molecules that cause the effect.

Aloha

Answer 2

All science. The reason is, is that light reflects off the oceans and lakes and is refracted (the light bounces off) things in the sky like clouds and other gases in the atmosphere. So that when we look up, see a blue sky. The area around us dictates what color the sky will be. For example, a grey sky is due to stormy weather, not as much of the light off the oceans and lakes makes it back down to us to see, it stays trapped in the upper part of the atmosphere by thick cloud cover and whatever else, is what will look grey in stormy weather.
The reason the sky is other colors at sunset is actually partially due to polution, and partially due to the atmospheric gases and particles. The sun goes down, and shines through some, burns up some, and is reflected and refracted off of particles and chemicals, and thats what makes the sky turn purples and oranges and reds and greens and all kinds of colors and sunrise and sunset.

Answer 3

The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths. Where the sunlight is nearly tangent to the Earth's surface, the light's path through the atmosphere is so long that much of the blue and even yellow light is scattered out, leaving the sun rays and the clouds it illuminates red, at sunrise and sunset.

Diffuse sky radiation is solar radiation reaching the earth's surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere. Also called skylight, diffuse skylight, or sky radiation. Of the total light removed from the direct solar beam by scattering in the atmosphere (approximately 25 percent of the incident radiation), about two-thirds ultimately reaches the earth as diffuse sky radiation.

Scattering (also called scatter) is the process by which small particles suspended in a medium of a different index of refraction diffuse a portion of the incident radiation in all directions. In (elastic) scattering, no energy transformation results, only a change in the spatial distribution of the radiation. The science of optics usually uses the term to refer to the deflection of photons that occurs when they are absorbed and re-emitted by atoms or molecules.

Answer 4

The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths and also because of density fluctuations in the moving air (see below). Combined, these effects scatter (bend away in all directions) some short, blue light waves while allowing almost all longer, red light waves to pass straight through. When we look toward a part of the sky not near the sun, the blue color we see is blue light waves scattered down toward us from the white sunlight passing through the air overhead. Near sunrise and sunset, most of the light we see comes in nearly tangent to the Earth's surface, so that the light's path through the atmosphere is so long that much of the blue and even yellow light is scattered out, leaving the sun rays and the clouds it illuminates red, at sunrise and sunset.

Answer 5

It is due to reflection of short wavelength waves.It is like oceans which are also blue.Allah has made it blue this way. Of course you are talking about first sky, we don't know the colors of the other sizx skies which are mentioned in Quran

Answer 6

http://www.answers.com/rayleigh%20scattering

Rayleigh scattering (named after Lord Rayleigh) is the scattering of light, or other electromagnetic radiation, by particles much smaller than the wavelength of the light. It occurs when light travels in transparent solids and liquids, but is most prominently seen in gases. Rayleigh scattering of sunlight by the atmosphere is the main reason light from the sky is blue.

Answer 7

Why is the grass green?
Why is anything any colour?
ill tell u why :D
light is made up of different colours.
(ie red plastic ony lets through red light and absorbs the other colours so the light looks red)
The air up in the sky absorbs all the colours except blue.
so the sky looks blue,
grass absorbs all colours except green so it looks green!
ta da!
arent i clever!

Answer 8

something about how blues are the only part of the visual spectrum not blocked by the atmosphere during the day. It changes in the evening and morning.

Answer 9

because the light reflects the air particles which make the color of the sky seem blue.

Answer 10

who said that the sky is blue?
any way because it is the sky........hahaha