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Is this Jeopardy?
OK I'll bite = "What is...a mirage?"
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∙ 13y ago
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∙ 16y agomirage
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How many months of constant day light does the south pole have?
Ignoring the effects of atmospheric refraction, the sun is above the horizon from about September 21 until about March 21, as seen from the south pole.
What is 3 examples of light refraction?
Refraction is the bending (changing direction) of light (or other wave) as it passes from one medium to another. Waves also change speed when refraction occurs. Most of the examples of refraction that people encounter in daily life involve light and either glass or water, but all waves exhibit refraction, including sound and water. 1. A relatively pure example of refraction can be observed if one places a straight object like a pencil partly in a glass of water and then observes the apparent change in the direction of the image of the straight object when it crosses the surface of the water. 2. A prism is an example of refraction. It also illustrates that the extent of refraction of light depends on the color. In a prism, light is refracted as it enters and as it leaves the prism and the light waves of different colors change directions by different amounts so that when they exit the colors are seen at different angles. 3. Rainbows have color because of refraction in a manner similar to a prism. The rainbow results when light waves encounter drops of water. There is also reflection involved and a full explanation is more complicated than the case of a prism. 4. All lenses (including the lenses in eye glasses) function because of refraction. Light enters the lens on one side and because the surface of the lens is curved, the angle of light inside is different depending on the place on the lens surface where it entered. That is called focusing light. It happens again as the light exist the lens. The eye itself has a lens that operates because of refraction and creates the image on the retina of the eye. 5. When you look into water, the objects that you see are not in the location where the image appears. Native peoples who hunted fish with a spear learned that you do not through the spear at the image of the fish because the angle of the light changes coming out of the surface of the water and makes it appear as though the fish is slightly displaced. 6. Sound refracts as does any other wave. One can not easily notice this, but if you are under water and sound enters from the air, the apparent direction will shift by some angle. 7. Water waves refract and it is easily demonstrated with a so-called ripple tank. When the depth of water changes, so does the speed of a wave. In a ripple tank one can place a flat surface on the flat bottom of a tank so there are two different water depths separated by a straight edge. Waves creates in one depth that encounter the edge at an angle will be seen to change direction. This is most obvious for very shallow depths around a centimeter. 8. Ocean waves change speed and so also demonstrate refraction but it is not clearly seen unless there is an edge such as described for the ripple tank. Ocean waves are a different sort of wave than a ripple but still can show diffraction. One can obviously see the change in speed and wavelength of waves as they come to a shore and that is related to the refraction process. 9. In old glass windows the glass is sometimes not very flat and ripples in the glass are evident. (Ripples in water give the same effect.) When you view an image through rippled glass the image is distorted because that light that entered was bent when it came in at an angle different than it was bent on the way out. The bending is refraction and the same kind of refraction as with a lens, but the ripples are irregular where as a lens is carefully smoothed.
How does the Newtonian telescope produce images of celestial bodies?
There is a concave main mirror at the low end of the telescope that focusses the image at a point above it. But before the rays arrive at the focus, they are reflected by a flat mirror set at 45-degrees so that the image is formed outside the side of the telescope, which is where the eyepiece is put.
Do radio waves move faster in glass than in air?
Radio waves move faster in air. Radio waves are an example of electromagnetic radiation, just as light is. Just as materials have an index of refraction for light, they also have an index of refraction for radio waves. All electromagnetic waves have the same speed in vacuum whether they are radio, light or gamma rays. The speed of electromagnetic waves in a material is equal to the speed of light in a vacuum divided by the index of refraction for that type of wave. The index of refraction of glass for radio waves depends on the glass but is well above 1 whereas for air, it is more like 1.0001. A similar comparison can be made for visible light. The index of refraction can, of course, be measured, but for air and glass one expects them to be quite different because there is a huge difference in the densities of the two materials. Air mostly empty space between molecules and so one expects electromagnetic waves to propagate at a speed very close to the speed in empty space. As a very crude rule, one expects the long wavelength index of refraction for transparent materials to increase when the number of electrons in the medium increases. Caveat: Statements made here would have to be modified if the energy of the electromagnetic wave were near an energy where it was absorbed by the medium.
What creates a twisted shape in a mollusk.?
TORISON
What is an image caused by refraction of light above warm surfaces?
imasge
What happens when a person looks at a glass of water with a pencil in it?
As light hits the water it is slowed down. As the light above the water is going at 3x108 m/s, and the light in the water is going considerably slower, the image of the pencil looks like it is split in two. This is called 'refraction'.
Why is the air above warm surfaces warmer then the air above cooler surfaces?
it releases heat into the air above it more or less easy :)
Is polarization similar to refraction interference or diffraction?
none of the above
Why is the air above warm surfaces warmer than the air above cooler surfaces?
Because it is hot on on side and cooler on the other side
Is there an image of a sand dune?
See the image above.
What is an upright image?
The image produced by the lens is above the principle axis.
How does water affect the viewer's image of an object that is above the water's surface?
Any light rays crossing the air-water border will be refracted, that is, bent. So, objects above the water will appear displaced. In other words, they will appear to be where they are not. You can see this phenomenon by placing a pencil in a glass of water. The pencil appears broken and discontinuous. This optical illusion is due to refraction.
What does the dog in the image above represent?
A taco
What does a clotheslines look like?
See the image above.
Is a mirage an example of refraction?
A mirage is the product of refraction, specifically at a moment when atmospheric refraction is unusually great. -- Because of the normal properties of atmosphere, light almost always curves downward slightly as it travels through air. That's normal refraction. -- During unusual atmospheric conditions, light may curve downward more sharply as it travels. When that's happening . . . -- Think of the light leaving an object, like a camel or a palm tree, at some unusually elevated angle above the horizon, and heading away from the surface. -- That light bends down more sharply than usual, and after traveling some unusually great distance, it's descending toward the surface. -- Somebody standing there where that light returns to the surface sees the object. But the light is coming at him from an unusually elevated angle, so it looks as if the camel or the palm tree is unusually high, in the sky, because that's where he's looking when he sees it. -- The unusual atmospheric conditions that can lead to this phenomenon typically consist of rapid increase of temperature and/or decrease in air pressure as you go up in altitude ... exactly what often happens in harsh desert, and a big part of the reason why the legends of flying horses and magic carpets come from places like that.
Where can you find a black leopard diagram?
See image above.
