Why does blue and yellow light combine to produce white light?
100159
The quote from the link explains how yellow is a combination of colors and when added to blue all the colors are represented and the result is white light.  This has to do with the fact that the normal human eye has only three different color receptors and many colors we see are mixtures. \n\n"White is the combination of all colors of light. In other words, the color white is seen when the red, green and blue channels all send signals to the brain. It follows that red light plus green light plus blue light produces white light. However red plus green without the blue produces yellow. By deduction, yellow light plus blue light most produce white light."
4645
because of water vapor (in the air...gives it a blueish hue.  not much to due with physics... maybe chemistry.
1149766
No, photons of light all travel at the same speed.  The different colors are because the photons oscillate at different frequencies, and the different frequencies of light are refracted (bent) at different angles with respect to the intersection with the surface of the prism (which is what the diamond acts as).  Yes, all the color frequencies exist withing white light.  In fact, pure white light almost never exists.  The spectrum of light from sources like the sun, fluorescent or incandescent bulbs all have flaws which can be read when they spectrum is spread out by a prism.  These flaws are indicative of the type of material that is producing the light.
227239
it reflects all light, which equals white light. the sun actually sends white light to earth, to, but different wavelengths (which means different colors of light) get separated out by our atmosphere, so we see the yellow and red ones from the sun.  but think about the last time you looked directly at the sun. it wasn't yellow, it's white.
703428
It used to be like that with fluorescent lights only, but not anymore.  See this article.\n\nhttp://www.eweb.org/business/energy/energysmart/ebd/9811/lighting_myth.htm
928161
OK, this question doesn't make sense, for two reasons:\n\n1.) Colors, by definition, are at different wavelengths. If the beam has 2 color components, each component would have it's own wavelength.\n\n2.) Your question at the end isn't a proper sentence, and is leaving a necessary part out.
170333
What happens here is the reverse of dispersion that is the spectrum of colours obtaines which u see as the colours of rainbow or light emerging out of prism. When u spun the top all the colours get mixed to form their parent colour which is white. The same phenomenon is evident when wheel decorated with all the colours of rainbow is rotated fast.
1184267
because white light is made up of many particles/waves of different wavelengths.  The bands aren't formed as in made, they're formed as in resolved or separated.  And they're seperated because when they bounce off of the interior angles of the prism they bounce at different angles, determined by their wavelength.
100945
If you want a very simple answer, here it is:\n\nThe white light from the sun is a mixture of all colours of the rainbow.\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.
368313
Ans. C.\n\nThey are having different frequencies.\n\nThey move with same velocity.\n\nThey have same type of polarization.\n\nOrange has a longer wavelength than yellow.
897035
White light is actually made of all the colors of the "visible spectrum", which ranges from red to violet. A prism or a rainbow shows these colors by sorting light according to wavelength.\n\nLight passing through a completely transparent medium, like a pane of glass, will not show much difference.\n\nLight passing through a colored medium will allow mostly light of the color's wavelength to pass through, so you see that color.\n\nLight reflected off an object shows a color if the object reflects light of that frequency (wavelength).\n\nThe colors have to be there first. Color is not "acquired" by light.
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.
159623
You may not realize it but in one qhestion you have asked for knowledge that is gained taking a university level physics course.\n\nSince I am a lousy typist, I will give you some clues that should allow you to visit Google and gather the answers you are looking for.\n\nThere are twi type if color mixing.  The additive method, used by painters, where you mix yellow and blue to get green.  \n\nThe subtractive method, used in optivs and video technology, where colors are filtered out as opposed to added in.  In this method the primary color are differet.\n\nIf you want a much more thorough explanation, you may want to examine the study of "Chromatics".  At look at how rainbows are created might help as well.\n\n\nBest of luck,\nJeffrey
1036658
When sunlight travels through the atmosphere, blue light scatters more than the other colors, leaving a dominant yellow-orange hue to the transmitted light. The scattered light makes the sky blue; the transmitted light makes the sunset reddish orange. \nI could go into explaining it, but I'm too tired at the moment. Check out here:
730478
White light is a combination of many wavelengths of the visible light spectrum.  As these wavelengths pass through water droplets suspended in the air, they are refracted at different angles.  Because of the angle of refraction, and because each wavelength of light is bent at a different, specific angle, the result is the division or sorting of light into wavelengths, which the human eye then perceives as color.\n\n:) Hope this helps!
199551
well nwhen white light goes through a prisdim, it breaks and turns into the colors of the rainbow. so when white light goes through the atmosphere, which acts like a prism, it breaks and we mostly see the blue
1020692
Sunlight is known as white light. Whit light is made up of seven different colored lights: Red, orange, yellow, green, blue, indigo and violet. When a ray of white light passes through a prism, it breaks into its components. This happens because all the seven colored lights have different wavelenghts and slightly diferent travelling speeds. A water droplet acts like a prism and refracts/divides white light into its seven componenets resulting in a rainbow.