why is the sky blue in color?

Answer 1

When all light (known as "White Light") is separated by a prism into the "Rainbow" spectrum of colors, it is BLUE LIGHT that you will find in the center of that spectrum. Blue light is the strongest of these color band wave lengths, so, therefore, when white light emitted from the Sun filters its way through earth's atmosphere, it is blue that is filtered the least, and it is blue that comes through the strongest, that we see.

Answer 2

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 3

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.



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.

Rayleigh scattering refers to the scattering of light off of the molecules of the air, and can be extended to scattering from particles up to about a tenth of the wavelength of the light. It is Rayleigh scattering off the molecules of the air which gives us the blue sky. Lord Rayleigh calculated the scattered intensity from dipole scatterers much smaller than the wavelength to be:


Rayleigh scattering can be considered to be elastic scattering since the photon energies of the scattered photons is not changed. Scattering in which the scattered photons have either a higher or lower photon energy is called Raman scattering. Usually this kind of scattering involves exciting some vibrational mode of the molecules, giving a lower scattered photon energy, or scattering off an excited vibrational state of a molecule which adds its vibrational energy to the incident photon.

Why isn't the sky black?
Our sky is colored because our atmosphere makes blue light when sunlight passes through it. This phenomenon is called "scattering." It is similar to when sunbeams reveal themselves in the presence of dust, most spectacularly in cathedrals. The atmosphere causes the sky to be colored.



If there were no atmosphere, the sky would appear black, like the lunar sky in Apollo pictures taken from the moon. But even a black sky has some lightness... Even at night, the sky always has a faint color, called "skyglow" by astronomers. Atmospheres also cause skyglow from faint airglow in the upper atmosphere (a permanent, low-grade aurora), and starlight scattered in the atmosphere. Even if there were no atmosphere, faint skyglow is caused by sunlight reflected off interplanetary dust (zodiacal light), and background light from faint, unresolved stars and nebulosity.

Answer 4

The sky is blue cos the colour spectrum, which is the Red, Orange, Yellow, Green, Blue, Indigo and Violet (ROYGBIV), refracts blue more than other colours.

At sunrise and sunset, red is refracted most cos of the angle which the sun's rays cut thru the atmosphere.

Answer 5

Earth consist of 80% of its surface covered with water
the reflection of sunlight falling on earth is blue
which can be seen by us
hence the sky is blue

Answer 6

Oxygen gas is actually slightly blue in colour... because there is so much oxygen in the atmosphere then it appears blue, we can not see this blue colour with only a small amount of oxygen... a similar thong happens with water.
A glass of water has no colour... however the ocean is blue... the blue colour happens because there is lots of water... likewise the blue sky is because there is so much oxygen gas in it.

The red colour is caused by light beding in the morning/evening and the red light bends more so that more red light reaches us than other forms of light.

Answer 7

its oyasis of color so sky is blue

Answer 8

just read aloo... he has covered me 100%

Answer 9

It is due to 'dispersion'phenomena
To know about dispersion, please search in google search or in wikipedia