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How much greater is the light-collecting area of one of the 10-meter Keck telescopes than that of the 5-meter Hale telescope?
Wiki User
∙ 14y ago
A 1 m telescope has a collecting area of pi x 1 x 1 = 1 pi
A 3 m telescope has a collecting area of pi x 3 x 3 = 9 pi.
Therefore, the bigger telescope collects 9 times as much light.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoThe area of any circle or circular aperture is proportional to the square of its radius.
A 10-meter-diameter circle has 4 times the area of a 5-meter-diameter.
Assuming constant efficiency, the "gain" of any circular focusing collector increases by
6 dB (4 times) when the diameter is doubled.
Wiki User
∙ 10y agoThe light collecting ability of a telescope is proportional to the area of the
objective lens or mirror, which in turn is proportional to the square of its
diameter. So a telescope with double the diameter collects (2)2 = 4 times
as much light.
Wiki User
∙ 11y agowe can measure it by using this equation
(9m/6m)^2 = 2.25
there fore, the telescope with 9m can collect light more than telescope 6m with 2.25x
Wiki User
∙ 7y agoA 6 metre telescope is twice as big as a 3 metre telescope so the light gathering power is 2 squared (ie the 6m has 4 times the light gathering power of the 3m).
Wiki User
∙ 6y agoThe ratio of the area is (60 / 10) squared, or 36.
Wiki User
∙ 11y agopenis
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Why are most large telescope reflecting telescopes?
It is cheaper and easier to create mirrors rather than lenses. Large lenses become difficult to support the larger they become. Additionally, mirrored telescopes fold light waves so that a telescope can be shorter, the same size telescopes with lenses are greater in length.
Is the telescope manned?
Terrestrial telescopes are generally manned, while space telescopes are unmanned. However, to a greater and greater extent, the people doing the observing are not the people actually manning the telescopes; the observations are done remotely from other universities around the world. The various space telescopes, such as the Hubble, the Kepler, or the Spitzer, or the soon-to-be-launched Webb, are remotely controlled in the same manner that everything is controlled these days; remotely, via computer.
For a research telescope (with a long focal length) would the thickness be greater or less than for a backyard telescope (with a short focal length)?
Technically the shorter the focal length, the thicker the mirror. But some short focal length telescopes have relatively thin mirrors all the same.
Why are most large telescopes reflecting telescopes?
They are refracting telescopes(:Large refracting telescopes are no longer built because there were too many problems with them. There was color distortion, light pollution, and when the object hits the focal point it turns upside down. Then you don't see the object for what it really is, you see it upside down and weird-ed out. They are to complicated and scientists believed they should just stick with the simple, small, original refracting telescopes!!!!-Meghan Betts (8th grader)
Do Professional astronomical telescopes generally have a much greater magnification than the telescopes you can buy in stores?
Nope. they dont.
Why are most large telescope reflecting telescopes?
It is cheaper and easier to create mirrors rather than lenses. Large lenses become difficult to support the larger they become. Additionally, mirrored telescopes fold light waves so that a telescope can be shorter, the same size telescopes with lenses are greater in length.
Why do astronomers currently prefer orbiting telescopes over earth-base telescope?
Orbiting telescopes are located in the sky, where it is not affected by the turbulence of the atmosphere, while ground-based telescopes are located on the ground, where the atmospheric turbulence (the moving of air) is greater. This is also the reason that some telescopes are built on mountains where the atmosphere is thinner and turbulence is smaller.
Is the telescope manned?
Terrestrial telescopes are generally manned, while space telescopes are unmanned. However, to a greater and greater extent, the people doing the observing are not the people actually manning the telescopes; the observations are done remotely from other universities around the world. The various space telescopes, such as the Hubble, the Kepler, or the Spitzer, or the soon-to-be-launched Webb, are remotely controlled in the same manner that everything is controlled these days; remotely, via computer.
Why does the HST get better pictures than a telescope earth?
The Hubble Space Telescope doesn't get affected by the Earth's Atmosphere. It also has the advantage of being in space so the quality and variety of images are a lot greater then any optical telescopes on Earth.
What are some telescopes names?
The two types are refractor and reflector. In a refracting telescope, the light comes in THROUGH a magnifying LENS where it is REFRACTED (bent) to focus the light into an objective lens. In a reflecting telescope, the light BOUNCES OFF a curved magnifying MIRROR , and then reflected again on a secondary mirror to direct the light into an objective lens. Among the advantages of a reflecting telescope are that in a refracting lens, the thickness of the lens can absorb some of the light, while a mirror reflects all of the light. Additionally, a reflecting telescope can "fold" the telescope into a much more compact instrument, which is essential with especially large devices. A large refracting telescope would be enormously heavy and cumbersome.
For a research telescope (with a long focal length) would the thickness be greater or less than for a backyard telescope (with a short focal length)?
Technically the shorter the focal length, the thicker the mirror. But some short focal length telescopes have relatively thin mirrors all the same.
Why are most large telescopes reflecting telescopes?
They are refracting telescopes(:Large refracting telescopes are no longer built because there were too many problems with them. There was color distortion, light pollution, and when the object hits the focal point it turns upside down. Then you don't see the object for what it really is, you see it upside down and weird-ed out. They are to complicated and scientists believed they should just stick with the simple, small, original refracting telescopes!!!!-Meghan Betts (8th grader)
Do Professional astronomical telescopes generally have a much greater magnification than the telescopes you can buy in stores?
Nope. they dont.
Why do astronomers continue to build even larger telescopes?
Radio telescopes allow us to see things that can't be seen in visible light. And vice versa, optical telescopes can show things that are not visible in radio telescopes. So, the information from both kinds of telescopes really complements each other.
Telescopes are used by astronomers for?
To study outer space in greater detail through magnification.
What is the use of telescope in ornithology?
Ornithological telescopes allow bird-watchers to observe birds from a distance, so there is less risk of frightening them away. Since they require a tripod, they are generally heavier to carry than binoculars, but binoculars are more difficult to use since they are more difficult to hold still and steady for any length of time. Also, telescopes are capable of greater magnification than binoculars.
How does the telescope help in the study of the heavenly bodies?
The telescope magnifies the image of an object, allowing us to see it in greater detail.
