Topic: Reflector Vs Refractor Telescope
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Answers to Common Questions
Why are the large telescopes reflectors and not refractors?
Large lenses deform under their own weight, but mirrors can be supported. Reflectors do not suffer from chromatic aberration like refractors do. Large mirrors need only one optical surface, achromats four surfaces to grind. Large, very clea... Read More »
Source: http://wiki.answers.com/Q/Why_are_the_large_telescopes_reflectors...
Which is cheaper, a reflector or refractor telescope?
joe - In terms of cost / aperture inch, the reflector is much more desirable. The refractor gets very expensive once you get above a couple inches of aperture. But you are paying for a sharper, if slightly dimmer, view of the universe with ... Read More »
Source: http://answers.yahoo.com/question/index?qid=20080217120611AA06nAP
What is the difference between a refractor and a reflector telesc...
A reflector telescope uses two mirrors instead o... Read More »
Source: http://www.chacha.com/question/what-is-the-difference-between-a-r...
More Common Questions
Answers to Other Common Questions
Refractor telescopes are rugged. The glass surface inside the tube is sealed from the atmosphere so it rarely needs cleaning.
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Source: http://www.chacha.com/question/what-are-two-advantages-for-the-re...
Particular method used, dictates what type of reflecting telescope ... ...MORE...
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Source: http://www.chacha.com/question/what-is-the-difference-between-ref...
a refractor has an objective lense at one end and an eyepiece at the other. The light from an object passes through the objective lense, is focused upon the eyepiece, which focuses the image for your eye. A reflector uses a mirror to gather...
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Source: http://answers.yahoo.com/question/index?qid=20071121133951AA0Lgdk
The REFLECTOR telescope, generally a synonym for the Newtonian design consists of TWO MIRRORS, one shoots the light out the side of the top of the tube. It is called the secondary mirror. The CATADIOPTRIC design is a family of telescopes wh...
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Source: http://answers.yahoo.com/question/index?qid=20100425160218AAWMLa8
A refractor uses a lens to collect light. A reflector uses mirrors to collect light. A Cassegrain is a sub-type of reflector, using a concave primary mirror and a convex secondary mirror. What you probably meant to ask about, rather than a ...
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Source: http://answers.yahoo.com/question/index?qid=20091029030418AAG9ZGP
Observatory telescopes are exclusively reflectors now because it not feasible to build refractors in the sizes now being used. The largest refractor in the world is only 40 inches (~1 meter) in diameter, while a 2 meter telescope is conside...
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Source: http://answers.yahoo.com/question/index?qid=20061029092842AAOFgew
Reflectors started becoming the preferred research telescope in the second half of the 19th century when processes for silvering glass were developed. (Modern mirrors are mostly coated with aluminum.) Prior to that, reflector mirrors were m...
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Source: http://answers.yahoo.com/question/index?qid=20071002213606AA1ts2D
