why is the sky 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.

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.

SOURCES:
http://www.sciencemadesimple.com/sky_blu...

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.

If you want another color of the sky, you need bigger particles in the air. You need something bigger than molecules in the air--dust.

Dust particles can be many times larger than air molecules but still small enough to not fall out to the ground. If the dust particles are much larger than the wavelength of light, the scattered light will be neutral in color (i.e., white or gray)---this also happens in clouds here on Earth, which consist of water droplets. If the dust particles are of approximately the same size as the wavelength of light, the situation gets complex, and all sorts of interesting scattering phenomena may happen. This happens here on Earth from time to time, particularly in desert areas, where the sky may appear white, brown, or some other color. Dust is also responsible for the pinkish sky on Mars, as seen in the photographs returned from the Viking landers.

If the atmosphere contains lots of dust, the direct light from the Sun or Moon may occasionally get some quite unusual color. Sometimes, green and blue moons have been reported. These phenomena are quite rare though---they happen only "once in a blue moon...." :) The dust responsible for these unusual color phenomena is most often volcanic in origin. When El Chicon erupted in 1982, this caused unusually strongly colored sunsets in equatorial areas for more than one year. The much bigger volcanic explosion at Krakatoa, some 110 years ago,
caused green and blue moons worldwide for a few years.

One possible exception to the above discussion is if the clouds on the planet are composed of a strongly colored chemical. This might occur on Jupiter, where the clouds are thought to contain sulfur, phosphorus, and/or various organic chemicals.

It's also worth pointing out that the light of the planet's primary is
quite insignificant. Our eyes are highly adaptable to the dominating illumination and perceive it as "white," within a quite wide range of possible colors. During daytime, we perceive the light from the Sun (6000 K) as white, and at night we perceive the light from our incandescent lamps (2800 K, like a late, cool M star) as white. Only if we put these two lights side-by-side, at comparable intensities,will we perceive a clear color difference.

Answer 2

the blue colour of the sky is through Rayleigh scattering. As mild strikes by the ambience, lots of the longer wavelengths pass instantly by. Little of the pink, orange and yellow mild is bothered by technique of the air. in spite of the indisputable fact that, many of the shorter wavelength mild is absorbed by technique of the gas molecules. The absorbed blue mild is then radiated in numerous guidelines. It receives scattered everywhere in the sky. Whichever route you seem, a number of this scattered blue mild reaches you. because you spot the blue mild from everywhere overhead, the sky seems blue.

Answer 3

A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

Answer 4

Sky is blue due to scattering of sunlight. During day time the rays of the sun has to travel a long distance along the horizon .so the rays with shorter wavelength like red, orange, yellow do not get scattered and the rays with smaller wavelength like violet, indigo and blue get scattered. thus the sky appears blue.
It is due to Rayleigh's law of scattering.According to this law the rays with shorter wave length scatter more than that with longer wavelength.

Answer 5

The blue color of the sky is due to Rayleigh scattering

Answer 6

it is because of the dust particles in the air. this diffraction of light theory was given by c.v.raman

Answer 7

sky is not blue ...it is smoky

Answer 8

i painted it blue
sorry
because of total internal reflection

Answer 9

b coz it cant be of another color.

try to change it