Why is the sky blue during the day time?
964257
Because it can't afford the electric bill at night.\n\nThat's what these people said, anyway.\n\nhttp://answers.yahoo.com/question/index;_ylt=AoclgkS1HktFEs2SLYLtaoYjzKIX?qid=20060821154042AAsV2bz\n\nhttp://answers.yahoo.com/question/index;_ylt=ApB4NoULKJPv_c4BISIwVpUjzKIX?qid=20060811134408AARLZkf\n\nhttp://answers.yahoo.com/question/index;_ylt=Ag88BdP1h9lITSPAi8YDh4AjzKIX?qid=1006041611802\n\nhttp://answers.yahoo.com/question/index;_ylt=Aizsx1hgrMqvhz9tbPuNsEIjzKIX?qid=20060825164415AAJWUy2\n\nhttp://answers.yahoo.com/question/index;_ylt=ApQ0l8J8.xB5vkF5.vFS_KsjzKIX?qid=20060722052816AAbMFPU\n\nhttp://answers.yahoo.com/question/index;_ylt=AkbB8.VN4op47EpOzaes5UQjzKIX?qid=1006032107844\n\nhttp://answers.yahoo.com/question/index;_ylt=Aq33ONPoMvMbun.yFId0oEkjzKIX?qid=1006042425914\n\nhttp://answers.yahoo.com/question/index;_ylt=AhyryTihy1jBul7AG8j6fgEjzKIX?qid=1006012620872\n\nhttp://answers.yahoo.com/question/index;_ylt=Arqn5ZTyaKWj3WzR7wboMeojzKIX?qid=1006011202888\n\nhttp://answers.yahoo.com/question/index;_ylt=Ap3PJ0WszarVUmcap8Vg7vEjzKIX?qid=20060813200908AAnqaqj\n\nhttp://answers.yahoo.com/question/index;_ylt=An1wzBRDduFBmyp.BDeCWCQjzKIX?qid=1006040818438\n\nhttp://answers.yahoo.com/question/index;_ylt=Ao4rNLiPVAzoqQgIUK2u1ssjzKIX?qid=1006031103740\n\nhttp://answers.yahoo.com/question/index;_ylt=AhSG0tAd0ZjaPExf9SxxUQkjzKIX?qid=1006040108864\n\nhttp://answers.yahoo.com/question/index;_ylt=AlcA.9_OnDeZMcIW7x4Pg.4jzKIX?qid=20060911160516AASK6kZ\n\nhttp://answers.yahoo.com/question/index;_ylt=AmyCiOHsHvH1ku0jBR3YxlUjzKIX?qid=20060628231238AAiWz6U\n\nhttp://answers.yahoo.com/question/index;_ylt=Aoi.c3dAx9zW8U4LQPPE2JEjzKIX?qid=20060616180125AAvNKTn\n\nhttp://answers.yahoo.com/question/index;_ylt=AmqMxXnrOkMlYpN1Vc9IXAwjzKIX?qid=1006040310353\n\nhttp://answers.yahoo.com/question/index;_ylt=ApW1ZbaNhDq90npoSzAnXNkjzKIX?qid=20061023032754AAlFjvS\n\nhttp://answers.yahoo.com/question/index;_ylt=AiEtYfYwf_vLbqv7wEtPVZAjzKIX?qid=20061031132405AAoinmy\n\nhttp://answers.yahoo.com/question/index;_ylt=An3KoJgue4YbPSuviXb6iAsjzKIX?qid=1006012702627\n\nhttp://answers.yahoo.com/question/index;_ylt=As_jCpUVf0fQZbI0m6jVHu0jzKIX?qid=20060714175655AAkV5ZL\n\nhttp://answers.yahoo.com/question/index;_ylt=Alyg4XdtZN1Fgrpk7oNWUWojzKIX?qid=20060902201926AAvDW4F\n\nhttp://answers.yahoo.com/question/index;_ylt=AjKH9VcgDwYwtsIL5m5zIm8jzKIX?qid=20060917102726AAQ6BIp\n\nhttp://answers.yahoo.com/question/index;_ylt=AnGVlCFMwPR_ZW6Ee0sT2EYjzKIX?qid=20061001113851AAYOfXw\n\nhttp://answers.yahoo.com/question/index;_ylt=Ak.UBSRjlgri6x2EZoM6.fQjzKIX?qid=1006052318763\n\nhttp://answers.yahoo.com/question/index;_ylt=AvRUqw8oYiX.qC35sWrXJV0jzKIX?qid=20061027091041AAh31DX\n\nhttp://answers.yahoo.com/question/index;_ylt=AgLMilgKNcRsXrqmsi9APCcjzKIX?qid=1006033028773\n\nhttp://answers.yahoo.com/question/index;_ylt=AgyArbukxAdqs_rrxC5QAlgjzKIX?qid=1006052409787\n\nhttp://answers.yahoo.com/question/index;_ylt=AjryLsGlnIYaxzGhB0g.hIQjzKIX?qid=1006042309777\n\nhttp://answers.yahoo.com/question/index;_ylt=Atee7zDSNi53HYuTwvGd1uIjzKIX?qid=1005121103085\n\nhttp://answers.yahoo.com/question/index;_ylt=AsSB9VfhfPyVIFNwJeRuOAojzKIX?qid=20060924185828AARoBwB\n\nhttp://answers.yahoo.com/question/index;_ylt=Akr7uA3VROmVJkKT0noTphIjzKIX?qid=20060927145312AA1ndKz\n\nhttp://answers.yahoo.com/question/index;_ylt=ApD.5jNrjBY_hP6qxUN.x5sjzKIX?qid=20061031065205AA1afek\n\nhttp://answers.yahoo.com/question/index;_ylt=AkZxTkLGHTPuUkJ4QtjeC5QjzKIX?qid=1006041014669\n\nhttp://answers.yahoo.com/question/index;_ylt=AnUsYy_SsCbi9IuDCEQk9f8jzKIX?qid=1006012704082\n\nhttp://answers.yahoo.com/question/index;_ylt=Ahdfv9gyqgQThnMdeQxa.FQjzKIX?qid=20060727202558AACNOFU\n\nhttp://answers.yahoo.com/question/index;_ylt=AjIzjTgSb4vLIHq7E4eoDawjzKIX?qid=20061003084712AADxBph\n\nhttp://answers.yahoo.com/question/index;_ylt=AhW3Yf7g4npIIozpKl72f1wjzKIX?qid=20060828125726AAHcdPu\n\nhttp://answers.yahoo.com/question/index;_ylt=AskAQELK4KNHCexVka61JGcjzKIX?qid=20060813192614AAiUpjX\n\nhttp://answers
1050973
the blue color of a beautiful sky
87869
The sky is technically clear - this can be seen on any clear night. 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.\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.
1120862
There is a very, very detailed answer to this at the source below, but in a nutshell (and I quote): "The sky is blue because it is scattering blue light from the sun."\n\nAnd NO: The sky is not blue because of reflections from the oceans. As the source below says, if that were true, then the sky would be more blue out in the middle of the ocean and less blue when you are far inland. But it's equally blue at both locations.
357291
the sea and sky is blue because of light refraction\n\nthe sea absorbs the longer wavelenghts of light which are near the red end of the visible spectrum, and reflects blue to our eyes which we see. \n\nthe sky reflects all of the light waves in the particles in the sky, water, CO2, Hydrogen, etc., and as it gets nearer to the earth where we can see, most of the red end of the spectrum has been absorbed and the blue is reflected back to our eyes. \n\nand sometimes there are particles that absorb other parts of the spectrum, which accounts for the colors of sunsets and etc.
137401
Blue on a clear day.\nWhite if it is cloudy.\nRed on a cloudy sunset.\nBlack at night.
80014
The nitrogen and the oxygen molecules in the air have the right dimensions to scatter blue light, but other colors pass through with little problem. So this causes the sky to look blue. \n\n(whitish sunlight)-(blue light scattered)= (yellowish sunlight)\n\nAs the sun sets (or rises), the sunlight passes through more air, and more blue light gets scatted, so the sunlight looks closer to orange or red\n\n(whitish sunlight)-(even more blue light scattered)=(red or orange sunlight)
66724
Rayleight Scattering.\n\nThe blue color of the sky is caused by the scattering of sunlight off the molecules of the atmosphere. This scattering, called Rayleigh scattering, is more effective at short wavelengths (the blue end of the visible spectrum). Therefore the light scattered down to the earth at a large angle with respect to the direction of the sun's light is predominantly in the blue end of the spectrum.
539871
in the summer the sky is blue because the atmosphere dullens the color of outer space but in the winter the sky is the color it is because of the water particles that are in the sky
463892
There is no such as the "real" color of the sky. The reason the sky is blue during the day is because the color of the light that the sun shines is white. And as you may know, white is the presence of all color and black is the absence of color.\n\nSo, the white light that the sun emits contains every possible color of light.  Now, each color of light has a different wave length depending on where it is on the color spectrum.  Red light has the longest wave length and blue/violet light have the shortest.  And since blue light has the shortest wave length, you see more of it's waves.\n\n\nsorry... that's the best i can explain it
276006
largely, for the same reason the sky is blue.  the amount that light is scattered is proportional to its frequency to the fourth power.  thus, blue light is scattered most strongly, and the sky appears blue.  at sunset (and sunrise), we're looking directly at the sun, and all the blue light has been scattered away.  other colors (yellow and green, mainly) are absorbed by the water vapor in the air.  the orange and red, being the smallest visible frequencies, are what come through the strongest.
1174306
The refraction (scattering) of light waves from the sun by our atmosphere causes the sky to appear 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.
249388
One of the most common questions on YA!\n\nA 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.\n\nSee the link below for full details.
1057175
Blue sky is cause the the defraction of blue light in the atmosphere... at night there is no light to defract....
721278
Yes, Saturn's sky could appear blue to someone in it looking up during the day, if it were not cloudy or hazy. It would be blue for the same reason Earth's sky is blue, scattered sunlight. The sky on Mars is not blue because the air is too thin. The red color comes from dust in the air.
244426
The blue sky phenomenon is caused by Rayleigh scattering of sunlight through the atmosphere.  The scattering is strongly polarized at 90 degrees from the direction of the sun.  The light is polarized tangentially with respect to the sun.