Hi..! my name is edd.. my question is ... "Why the sky is blue?" is it really blue?... pls answer pls...

Question

pls help me to answer that as soon as possible..

Answer 1

There is a physical phenomenon called Rayleigh scattering that causes light to scatter when it passes through particles that have a diameter one-tenth that of the wavelength (color) of the light. Sunlight is made up of all different colors of light, but because of the elements in the atmosphere the color blue is scattered much more efficiently than the other colors.

So when you look at the sky on a clear day, you can see the sun as a bright disk. The blueness you see everywhere else is all of the atoms in the atmosphere scattering blue light toward you. (Because red light, yellow light, green light and the other colors aren't scattered nearly as well, you see the sky as blue.)

Answer 2

I remeber my physics teacher talking about this but I wasn't listening because i was playing with a green laser of his. I think it had something to do with how the light reflects on it or something.

Answer 3

Because light from the sun is scattering by atoms and molecules in the atmosphere.

Light scattering by particles depends on the relative "sizes" of the photons and the particles.

In the case of visible light, molecules are much smaller than the wavelength of light, so blue light gets scattered much more than red light.

So as light from the sun enters the atmosphere, more blue photons get reflected (not absorbed) by molecules than red photons - but then the blue photons get reflected again and again until they reach us. So the blue light comes from all over, the red light comes almost straight from the sun.

This is also why the sun looks redder at sunrise and sunset - the light's path through the atmosphere is longer when the sun is on the horizon than when it is high in the sky.

Interaction of light with the atmosphere does all sorts of weird and wonderful things that physics can explain:

http://hyperphysics.phy-astr.gsu.edu/Hba...



Or look at the many times this question has been asked before by searching for your question – I think it has been asked over 8000 times

Answer 4

yeah its really blue.

the sun radiates all the colors of the spectrum ROYGBIV(red, orange, yellow, green, blue, indigo, violet)....

in dat order, but one of the layers of our earth, (probably the atmosphere, clarify this) filters the other layers or colours, leaving only blue.

its more complex than this, a lot of physics and stuff, but this is the basic reason.

Answer 5

The sky is blue because it isn't green.

Answer 6

very good question

The Earth's sky is blue because the air molecules (largely nitrogen

and oxygen) are much smaller than the wavelength of light. When light

encounters particles much smaller than its wavelength, the scattered

intensity is inversely proportional to the 4'th power of the

wavelength. This is called "Rayleigh scattering," and it means that

half the wavelength is scattered with 2**4 = 16 times more intensity.

That's why the sky appears blue: the blue light is scattered some 16

times more strongly than the red light. Rayleigh scattering is also

the reason why the setting Sun appears red: the blue light has been

scattered away from the direct sunlight.

Thus, if the atmosphere of another planet is composed of a transparent

gas or gases whose molecules are much smaller than the wavelength of

light, we would, in general, also expect the sky on that planet to

have a blue color.

Answer 7

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.

Blue sky from scattered light

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

Sky paler at horizon

THE BLACK SKY AND WHITE SUN

On Earth, the sun appears yellow. If you were out in space, or on the moon, the sun would look white. In space, there is no atmosphere to scatter the sun's light. On Earth, some of the shorter wavelength light (the blues and violets) are removed from the direct rays of the sun by scattering. The remaining colors together appear yellow.

Also, out in space, the sky looks dark and black, instead of blue. This is because there is no atmosphere. There is no scattered light to reach your eyes.

Answer 8

Our atmosphere scatters blue light just like clouds scatter white light. This is why colorless water vapor in the sky looks white. Basically, this just means that air is blue, but that it is so close to  being completely clear that you only notice it when you looks through miles and miles of it, as when you look at the sky. This is also why the sky turns black at night...there is no sunlight to scatter.