why sky seems to be in blue colour?

Answer 1

because of the presence of water vapour in the atmosphere

Answer 2

the scientific answer is The first thing to recognize is that the sun is an extremely bright source of light -- much brighter than the moon. The second thing to recognize is that the atoms of nitrogen and oxygen in the atmosphere have an effect on the sunlight that passes through them.

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 3

Like energy passing through the ocean, light energy travels in waves, too. Some light travels in short, "choppy" waves. Other light travels in long, lazy waves. Blue light waves are shorter than red light waves.

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time
Closer to the horizon, the sky fades to a lighter blue or white. The sunlight reaching us from low in the sky has passed through even more air than the sunlight reaching us from overhead. As the sunlight has passed through all this air, the air molecules have scattered and rescattered the blue light many times in many directions. Also, the surface of Earth has reflected and scattered the light. All this scattering mixes the colors together again so we see more white and less blue.

Answer 4

The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths. 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.

Answer 5

WHY IS THE SKY BLUE?
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.

More detail from this site..........
http://www.sciencemadesimple.com/sky_blue.html

Answer 6

I think there is few direct relationship between the color of the sky and the temperature. But there are three important factors that are indirectly related with temperature and that affects greatly sky appearance.

1) Altitude. As the altitude gets higher, the Rayleigh dispersion (which originates the blue color) gets smaller because atmosphere layer for dispersion gets thinner, making the blue more deep and dark. Eventually, when you get enough altitude the sky turns absolutely black. Temperature normally decreases with altitude.

2) Dust particles produces white dispersion that tends to shift blue color to the white. Dust presence is favoured by thermal convection. Anticyclonic conditions (often leading to cold days) kill thermal convection and so reduce atmospheric dust concentration.

3) Water condensation micro-drops. The effects are quite similar to the dust one. In cold anticyclonic days, the water condenses very close to ground, ( sometimes leading to fog), letting upper atmospheric layers very dry and clear.

Answer 7

sky seems to be blue because of the penomenon of rayleigh scattering where the sunrays travelling through the earth's atmosphere are scattered in rainbow colours.As the blue colour has the least wavelenght is scattered four times more than other colours.thus sky appears blue.

Answer 8

The blue color of sky is on the account of scattering of sun light.Light from the sun,while travelling through earth's atmos-
-phere, gets scattered by large number of molecules in the earth's atmosphere.
According to Reyleigh, the intensity of scattered light varies inversely as the fourth power of the wavelength of light.
As wavelength of blue color is less than the wavelength of red color,therefore maximum scattering is of blue color.Hence the sky appears blue.

Answer 9

Sunlight or v can say white light is made of 7 colors(VIBGYOR),Since blue light has smaller wavelength,so it is scattered predominantly by the air molecules(acc. 2 Releigh's Scattering Law).So d sky appears blue.

Answer 10

because the sky reflects blue colour of the spectrum VIBGYOUR and absorbs all the other colours.

Answer 11

Basically because of the oxygen in the atmosphere.
The blue color is caused by ozone in the upper atmosphere: Solar ultraviolet light is absorbed by an ozone molecule which breaks up into oxygen atoms that then re-emit a blue photon.