whts the colour of ared rose when seen in blue background light?
147388
If the rose is a red rose, its color is still red.  It might look different, but I assure you, its still red.
320712
it is still blue, just the light has gone.  like the room goes dark when you turn the light off.  it doesn't change colour, just lighting.
65636
You're right, Red+Blue=Violet.  The light doesn't have to interfere.  You don't have violet cones in your eye (you have 3 that are more or less maximally receptive at red, green, and blue)... your brain interprets equal amounts of blue and red neurons firing as the color violet.  It also interprets equal amounts of red and green light as yellow.  \n\nNow you should wonder what happens when light of 400nm hits your eye.  You don't have violet cones, but this light is not in an energy eigenstate, so you can express it as a linear combination of red and blue wavelengths... the result is that 400nm light will excite red and blue cones in equal amounts so you view it as violet.
676088
No colour. But Red , Yellow Blue & Green are on wires. RYB are 3 main phases. G is Earth /Neutral.
384190
Try Autumnal/Fall colours...\nLight and dark Golds....Burgundy, Creams, Russet...
1020277
Tiger's Eye (Alexandrite)\nIt's cool the way the gem is one color is indoor light and another color in sunlight.
1058175
Flowers which change color often do so based upon the acid or base content of the soil.\n\nThis might be the situation in your case.
916826
"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. "
939967
When the sunlight enters the Earth's atmosphere, it scaters. The light passes throught the molecules of gases in the air and scates. The only one colour that is visible to us most of the time is blue. During sunrise and sunset, the sunlight has to go through more atmosphere and the blue changes to reds, oranges and purples.
942407
normally blue because the oxygen diffuses blue light most.
116911
hot pink\nheliotrope (kind of a weird pinkish purple)
1055537
Here is something interesting to think about: When you look at the sky at night, it is black, with the stars and the moon forming points of light on that black background. So why is it that, during the day, the sky does not remain black with the sun acting as another point of light? Why does the daytime sky turn a bright blue and the stars disappear? \n\nThe 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. \n\nThere 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. \n\nSo 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.)
764619
To start of with we must understand what light is. \n\nLight isnt just made up of 1 colour, it contains a number of different colours each of which has a different wavelength. Light is split up into the following colours with the first having the longest wavelenght and the last having the shortest. \n\nRed\nOrange\nYellow\nGreen\nBlue\nIndico\nViolet\n\nAn easy way to rememeber this is ROY G BIV (my year 12 geology teacher taught me that about 8 years ago)\n\nAs light moves through the atmosphere, most of the longer wavelengths are able to 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 in the atmosphere which is mainly nitrogen (78%) and oxygen (21%). The absorbed blue light is then scattered in all different directions. Since you see the blue light from everywhere overhead, the sky looks blue. \n\nOn Earth, the sun appears yellow. If you were out in space, or on the moon, the sun would look white. In space, there is no atmosphere to scatter the sun's light. On Earth, some of the shorter wavelength light (the blues and violets) are removed from the direct rays of the sun by scattering. The remaining colors together appear yellow. \n\nYou didnt ask about sunsets, but what the heck :)\n\nWhat happens during sunsets is that as the sun begins to go down, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected and scattered. As less light reaches you directly, the sun appears less bright. The color of the sun itself appears to change, first to orange and then to red. This is because even more of the short wavelength blues and greens are now scattered. Only the longer wavelengths are left in the direct beam that reaches your eyes. \n\nThe second part of the your question is a lot easier. The sky is black simply  because of the lack of light from the sun going through the atmosphere. If there are no colours from the spectrum to get absorbed then the only thing that is left is the blackness of the sky.
170085
From Physlink.com:\n\nThe red colour in the sky at sunset (and sunrise) is due to an effect called Rayleigh scattering. There is a similar form of scattering called Mie scattering which is responsible for the white colour of clouds. \n\nParticles in our atmosphere that are approximately the same size as the wavelength of visible light cause the white light from the sun to scatter and split into individual components. Oxygen and Nitrogen (the main components of our atmosphere) scatter violet and blue light due to their small size. This is why the sky appears to be blue in the day time, especially at midday when the Sun is closest to us. \n\nDuring sunrise and sunset the distance that the light has to travel from the Sun to an observer is at its greatest. This means the a large amount of blue and violet light has been scattered so the light that is recieved by an observer is mostly of a longer wavelength and therefore appears to be read.
85611
The sunlight at sunset and sunrise is considerably more orange and/or red than it is when the sunlight is directly overhead. This is because the sunlight has passed through more air, which contains nitrogen and oxygen molecules. These molecules are the right size to scatter away the short wavelengths of the sunlight (the blue end of the spectrum), leaving the long wavelength, red light. This is known as Rayleight-Tyndall scattering. If there are a lot of dust particles or water droplets in the air, these are considerably larger than the nitrogen and oxygen molecules, and they will reflect the red and orange colors of the sunlight, making the sunrises and sunsets more red.
1064938
I see it blue..isn't it??
137401
Blue on a clear day.\nWhite if it is cloudy.\nRed on a cloudy sunset.\nBlack at night.