why sky is 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

It's called the Tyndall Effect (or, more appropriately, Raleigh scattering). This is the phenomenon seen when particles in a solution reflect light. Suppose you were exploring your aunt's attic, and you took a flashlight up to have a looksee for some old clothing. When you throw back the door and it slams to the floor, it throws up a billow of dust. When your flashlight shines through it, you see the light beam of your flashlight, because the light is being reflected off of hundreds of thousands of dust motes and particles.

The same thing, in effect, happens in the sky. When the sun shines through the atmosphere, it strikes the particles that make up our atmosphere. When these particles scatter light, they scatter the light of the shortest wavelength - blue. See, when John Tyndall did his experimentation with this effect, he discovered that the amount of light reflected is inversely proportional to the fourth power of wavelength for particles that are small enough to do so. Blue light is scattered more because it has a shorter wavelength than red light. So, if you do the math, take the wavelength of blue light and divide it by the wavelength of red light - 700/400, then take it to the fourth power. This = 10, or 10 times more blue light is scattered than red light.

But, the least energetic light on the visible spectrum is violet. Why isn't our sky violet? Well, it has to do with a few things. First off, the energy of the light coming from the sun required to make violet light scattered is mostly absorbed by the atmosphere, since there's less of this higher-energy light being emitted from the sun. The second main part is all about how our eyes receive light. We have three main colors we see best - red, green and blue. Since there's less red light, the red receptors don't respond very strongly. The green receptors respond at a kind of intermediate-amount, and the blue receptors respond the strongest, but - these wavelengths also stimulate the red receptors just a little bit extra. So, when you combine all of these colors, you get the pale blue color of the sky. It's much like mixing paint on a palette!

During the evening, when the sky goes reddish, the light must pass through more atmosphere than during noon. Because it passes through more atmosphere, the energy of the light is reduced as it runs into more and more atmosphere particles and is refracted over and over. Because the energy is reduced, the light shifts to a lower wavelength - towards the red end of the spectrum.

Hope this helps!

Answer 3

The sky is blue due to the very high nitrogen content in the amosphere. Nitrogen tends to absorb most of the light spectrum, but reflects blue light. Thus the sky appears blue. In all reality, the sky is air, and is a clear gas.

And no the sky does not reflect the ocean. Actually, the ocean reflects the sky... (If it were the ocean making the sky blue wouldn't ocean water be blue?)... You gotta think about these things..

Answer 4

It has to do with refraction of light through the atmoshere. Blue is typically the only color that makes it through, the rest bounce off. There are exceptions, like around dusk and dawn, when light hits the atomoshere differently and allows some other color in.

Answer 5

Do you mean to ask:

Why is earth's sky visible from it's surface and viewed during daylight the color blue?

You should find the answer here:

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

Answer 6

God likes Blue

Answer 7

It's reflecting the ocean..blue=water.

Answer 8

The molecules in the air layered over and over millions of times makes it blue. (The molecules are blue)

Answer 9

It is the reflection of the sun off the ocean, then reflected back off of the condensation and denser chemicals in the upper atmosphere.

Answer 10

Light scttering for blue colour is very low .thus reducing all colours except BLUE.