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If white light goes into a material and only blue light comes out the other wavelengths have been?
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∙ 12y ago
absorbed
Wiki User
∙ 12y ago
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What color reflects heat best for an outside umbrella?
White light is made up of all the different colors of light, as can be seen when it is separated into these various wavelengths using a prism. The colors that we see are the wavelengths of light that are being reflected off of the objects we are looking at. Objects that are red will reflect only red wavelengths and will absorb the other wavelengths; objects that are blue will reflect only blue wavelengths and will absorb the other wavelengths; etc. Black objects absorb all visible wavelengths of light, which is why black asphalt gets so hot in the sunlight. White objects reflect all wavelengths of light. Therefore, a white umbrella would reflect the largest amount of light. However, this does not necessarily imply that it would be the best color to use for an umbrella because what really matters is how much light is transmitted through the umbrella to reach the shade below. The more light that gets through, the less effective the umbrella is in providing you with shade. Therefore, what really matters is how opaque the umbrella is, rather than what color the umbrella is. The opaqueness will be more characteristic of what material the umbrella is made of than what color it is. The fraction of the light that is transmitted will equal all the light that strikes the umbrella that is neither reflected nor absorbed. Thus, it is best to find an umbrella which combines high reflectivity with high opaqueness (generally a thick material) in order to keep the umbrella from heating up and stop the greatest percentage of the sun's rays from reaching you.
What kind of objects materials that absorb light?
First, you need to define "light". Visible light only? Up into the ultra-violet? Down into infrared? Many filters wil block and/or reflect wavelengths above or below a certain cutoff point, while passing waves away from that point. As a for instance, a red filter will pass wavelengths from around 550 nm and longer, while it blocks anything shorter than 550. A green filter is a "notch" filter, in that it will only pass wavelengths from around 550 to around 500 nm. At the other end, a blue filter will block anything longer than about 500 nm, and pass shorter wavelengths, possibly up into the ultraviolet range.That being said, nothing in this universe is perfect. No surface will reflect all wavelengths that land on it; any reflective surface will have some losses, both through what it allows to pass, and what it absorbs into itself, generally turning into heat. On the other end, the closest thing you might find to a "surface" that could absorb all light that falls on it would be a black hole.
Why does grass look green to us Use terms reflect and absorb in this answer?
because it reflects green light and absorbs the other visible wavelengths
Where do the prism come from?
Light (or sunlight) is made up of all the wavelengths of light combined. If you mix all the colours of the rainbow together you get white. A prism just spreads out the individual wavelengths to illustrate the different colours. Different colours of light are just different mixtures of these.
What must happen to all wave lengths of light for a substance to appear white?
The colours we see in an object are only the colours that are reflected. Inferentially, the other colours are absorbed. The grass is green (when illuminated by a white light source) because the redder end of the spectrum is absorbed and used by the plant to do its stuff - photosynthesis and so on. A white card appears white because all the light wavelengths [to which we can respond] are reflected. That card may absorb some of the white light, but not at wavelengths to which we respond.
What determine the color of an object?
Light comes in many different "wavelengths". The wavelength of a beam of light determines its color.White light contains light of all different wavelengths, but objects can reflect of absorb different wavelengths.The light that an object reflects determines its color.In other words, an object that looks red must be absorbing all wavelengths of light except red.
Why different colors appeared by different material?
White light is a mixture of different colors. Different materials have different surface properties; as a result, one material may reflect a larger percentage of red light, and a smaller percentage of other colors, such as blue or green light - thus, it will appear red. Another material may reflect more green light than other colors, so it will appear more green.
Where does gold get its color from?
Gold, like any other coloured material absorbs all the wavelengths of light apart from the ones reflected. In this case, a golden yellow.
What is the color of an object is?
The color of an object are defined by the wavelengths of visible light that the object reflects. This reflected light is picked up by our eyes and interpreted as color. The other wavelengths of light are absored.
What color does not absorb all wavelength of light?
Black is the only color that does absorb all wavelengths of light.White is the color that reflects all wavelengths of light.All other colors absorb only certain wavelengths of light and reflect the rest.
What does an electromagnetic refer to?
A range of wavelengths of light that increases from one end to the other
Why does chlorophyll look green?
It absorbs all other wavelengths of visible light.
Why are objects the color that they are?
Visual perception is a result of light being detected by your retina at the back of your eye. Light of different wavelengths determines colour. Objects that are a specific colour absorb light of certain wavelengths and reflect light at other wavelengths. So if an object is green that is because it is absorbing the red and blue light and reflecting green.
What is the fastest visible light wavelength?
If you're talking about how long it takes light to get from here to there ... all wavelengths of light, as well as all wavelengths of every other example of electromagnetic radiation, all travel at the same speed.
What do mirrors and other objects do pertaining to light?
Mirrors and other objects reflect light, though most objects absorb some wave lengths and reflect others and black absorbs all wavelengths and white reflects all wavelengths.
What is a hydrogen filter for a telescope?
A filter to let through certain wavelenghts of light. The wavelengths that Hydrogen is most active in. Other light does not get through so objects that "shine" in those wavelengths do not show in the image.
Can light blind you to death?
It is unlikely, but other wavelengths of the electro magnetic spectrum can certainly kill you.
