I wanted to ask that why sky looks blue?Give some scientific reasons?
816849
the atmosphere contains lots of air molecules which scatter the light that passes through them.\naccording to rayleigh, if the size of scattering particle is very very less than the wavelength of light (eg. air molecule), then light of shorter wavelength will be  scattered more than light of longer wavelength.Since in the visible spectrum, blue has shorter wavelength than red....... it gets scattered more than any other color.
185884
Neither is blue. \n\nThe SKY\nThe 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. \n\nHowever, 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. \n\nThe Sea.\nParticles and solutes can absorb light, as in tea or coffee. Green algae in rivers and streams often lend a blue-green color. The red sea has occasional blooms of red Trichodesmium erythraeum algae. \nParticles in water can scatter light. The Colorado river is often muddy red because of suspended reddish silt in the water. Some mountain lakes and streams with finely gound rock, such as glacial flour, are tourquise. Light scattering by suspended matter is required in order that the blue light produced by water's absorption can return to the surface and be observed. Such scattering can also shift the spectrum of the emerging photons toward the green, a color often seen when water laden with suspended particles is observed. \nThe surface of seas and lakes often reflect blue skylight, making them appear bluer. [[[ Montana reflection.]]] The relative contribution of reflected skylight and the light scattered back from the depths is strongly dependent on observation angle.
192425
there are two reasons for the color of the sea:\n\nA. the sea reflects the sky.\nyou have probably noticed that the sea is not very blue-looking when the sky is overcast. water reflects and scatters the light that strikes it; this is shown by the fact that you can see your reflection in puddles. when the sky is brilliant blue, the sea is also, because it reflects the blue of the sky. \n\nB. blue light is more easily bent, or refracted, than red light. thus, light refracted back from the surface of the sea appears blue. furthermore, when you are underwater the water around you appears blue because more blue light is scattered back to your eye than red light.
389615
No. 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.
159646
The blueness of the sky is caused by sunlight scattering off particles in the atmosphere.  The intesity of the scattering is a strong function of the wavelength of light, so the blue light (one end of the spectrum) is observed more than red (the other end).
680108
There are two reasons. Both are caused by a property of light -- it is made up of different wavelengths.\n\n(1) When light passes through our atmosphere, it diffracts & blue wavelength gets scattered towards earth. This is why the sky is blue. When viewed from the beach, the sea is also blue because it reflects the sky, of course.\n\n(2) Another reason is not by diffraction, rather, light under the sea is blue because water absorbs longer wavelength of light through distances over about 20 metres.
674370
The simplest way to explain it to a 9 year-old would be simply to say that the blue sky is actually sunlight - but all of the colours of light from the sun can pass through the air except blue, and that the sun scatters this blue light in all directions so that you see blue wherever you look.  This is also the reason why the sun appears yellow - in reality it is white because when you mix all colours together you get white - but when you take the blue light out and scatter it all over the sky, then all of the remaining colors add to give you bright yellow.
1048733
The sky is blue partly because air scatters short-wavelength light in preference to longer wavelengths. \nWhere the sunlight is nearly tangent to the Earth's surface, 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, at sunrise and sunset.\n\nso\n\nAn old weather predicting adage rhythmically states: \n\nRed sky at night, Sailors' delight.\nRed sky in morning, Sailors take warning. \n\nHumidity in the air is indicated by red skies at sunset-- red sky at night-- or, at sunrise-- red sky in morning. The forming raindrops scatter the short-wavelength blue light so that only the long-wavelength red light reaches the observer.
28618
The sky is blue because the nitrogen in the air scatters the blue light out of sunlight. \n\nOur sun is a yellow star, so it has slightly yellow light, but it is still pretty close to white light.\n\nSunlight on earth is slightly yellower than it is in space because some of the blue light in sunlight gets scattered out by the presence of nitrogen in the air, making the sky appear blue. So \n\n(White light) - (Some Blue light) = (Yellow light)\n\nAs the sun sets, the sunlight travels through more air, and the nitrogen scatters out more blue light and the sun appears first orange, and then finally red.\n\nAs the sun starts to set:\n\n(White light) - (More Blue light) = (Orange light)\n\nand finally as the sun has almost set:\n\n(White light) - (Lots of Blue light) = (Red light)
375813
Sky is blue because air is not perfectly transparent.  If you look through many miles of it, it gives a bluish color. [This is another way of saying that blue light is scattered by the atmosphere.] The only direction in which you can look through enough miles of air is upwards.  \n\nClouds are not always white.  Clouds can also turn grey or black and they are made out of the very same water molecules they were before.  It all has to do with how large the particles are, when the cloud is newly formed all the water droplets are very tiny and therefore all light is reflected, ie they look white.  As the tiny droplets glom together into larger pieces of airborne water, light can be absorbed more and more, and the cloud turns darker.
176242
I have no idea what you are asking. The question "why is the sky blue?" has been asked over 500 times here. Use the search engine to find some great material. \n\nYou want data that proves the sky is blue? The variable might be the wavelength of the light (or frequency). If you want to learn about the equations, look up Rayleigh-Tyndall scattering. The scattering intensity is roughly proportional to L^(-4), where L is the wavelength.
672709
To answer this question, you should know that the white light is made up of seven different colors (violet, indigo, blue, green, yellow, orange and red). When sunlight (which is white colored) hits the Earth's atmosphere the blue components of the white light bend so much that it seems like they surround the Earth causing the sky to look blue. \nThe seas llok blue because they act like a mirror and they reflect the sky. The sea color is darker than the sky because of the depth of the seas (Beer-Lambert's Law). The rivers are not suppose to be deep and that's why they don't appear blue. If human eyes were really strong then we could have seen that the rivers are slightly blue.
810923
The sky appears blue to us on a clear day, because the atoms of nitrogen and oxygen in the atmosphere separate the suns white light into its many colours, and scatter them throughout the atmosphere.The wavelength of the blue light scatters better than the rest, predominates over the other colours in the light spectrum, and makes the sky appear blue to us.The scientific name for this phenomenon is the Tyndall effect, more commonly known as Rayleigh scattering.\n\nThis phenomenon describes the way in which light physically scatters when it passes through particles in the earths atmosphere that are 1/10th in diameter of the color of the light. The light spectrum ranges in wavelength from red to violet, and, since the wavelength of the blue light passes through the particles with greater ease than the wavelengths of the other colors of light, the sky appear blue to the naked eye.\n\nThe human eye has three types of light receptors, known as cones, located in the retina. The cones are either considered to be red, or blue, or green, based upon their strong response to light at these wavelengths. As light stimulates these receptors, our vision translates the signals into the colors we see.\n\nWhen gazing at the sky, the red cones respond to the small amounts of red light scattered, and even less strongly to the orange and yellow wavelengths. Although green cones respond to yellow, their response to scattered green and green-blue wavelengths is stronger. Finally, colors near the strongly scattered blue wavelengths stimulate the blue receptors.\n\nIn short, the skylight stimulates the red and green cones almost equally, while stimulating the blue cones more strongly. For these reasons, our vision naturally adjusts as clearly as possible to separate colors.
966396
AHHHH !!!!A question other than why is the sky blue.  The color of the sky is colorless, clear.  Look at the shots of earth from space (on the night side) you can see earth perfectly, no color enhancement.  Look up at the stars on a clear night, you can see them without any bluish color.\n\nThe sky is only various colors when the sun is shining thru it.
1015359
using simple physics\n\nThe 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.\n\nthe grass is green because the other colors are absorbed and only green is reflected. Grass and most other plants are green because they contain a pigment known as chlorophyll.\n\nSun isn't really yellow. The color yellow is a purely human interpretation of a collection of radiation that hits the retinae of our eyes and gets processed by our visual cortex.
344653
First off why is the sky any color at all and not black?\nThe answer -- the presence of the atmosphere -- oxygen molecules absorb energy and release at pretty much a random angle(Rayleigh scattering). So the light from the sun is "diffused" around the atmosphere and when it reaches our eyes it come in from all directions -- creating the colored sky effect.\n\nNow on to the 2nd question why is the sky specifically blue. Blue is high energy color(it is created by high frequency waves) so it does not spread as much as other colors. In fact the sky is not uniform blue -- Come out of your house on a clear sunny day and you will see that the sky is the bluest directly above your head but it gets more and more white as you look toward horizon. This means that blue light diffuses the least creating blue appearance around the sun -- but as you look further from the sun more colors are visible creating the white effect. \nThe Sky may also be seen in weird colors like red and orange when the sun is at the sharp angle with the atmosphere(dusk and dawn).
1089706
When transmitted light such as sunlight enters our atmosphere it collides with the oxygen and nitrogen atoms. The color with the shorter wavelength is scattered more by this collision. Because violet and blue are the shortest wavelengths the sky appears to be violet / blue. But because our eyes are more sensitive to blue light than they are violet light, we perceive the sky as blue.\n\nIt is because blue light from the sun strikes the air molecules and scatters and our eyes perceive it as blue.\n\nBlue in sunlight collides with air molecules and our eyes see it as blue.