A Dutch eyeglass maker named Hans Lippershey invented the first refracting telescope in 1608. While working in his shop, he discovered that viewing a distant object through a concave lens and a convex lens held in front of one ...
http://www.life123.com/technology/home-electronics/tele...
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Refracting telescope - Wikipedia, the free encyclopedia
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A refracting or refractor telescope is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope). The refracting telescope design was o...
en.wikipedia.org/wiki/Refracting_telescope
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Telescope - Wikipedia, the free encyclopedia
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A telescope is an instrument designed for the observation of remote objects by the collection of electromagnetic radiation. The first known practically functioning telescopes were invented in the Ne...
en.wikipedia.org/wiki/Telescope
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The refracting telescope is thought to have been invented in 1608 by Dutch optician Hans Lippershey, who quite by accident discovered that magnified images were produced when placing one lens in front of another.
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www.optcorp.com/info_refractor.aspx
www.optcorp.com/info_refractor.aspx
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We discuss the principles of refracting telescopes in this section and of reflecting telescopes in the following section. ... The following figure illustrates the use of a lens to gather and focus light, and the use of two lenses to make a simple refracting telescope. ... Principle of refraction and the refracting telescope...
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csep10.phys.utk.edu/astr162/lect/light/refracting.html
csep10.phys.utk.edu/astr162/lect/light/refracting.html
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; A refracting telescope uses two lenses to magnify what is viewed; the large primary lens does most of the magnification. The first refracting telescope was invented by Hans Lippershey in 1608.
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www.enchantedlearning.com/inventors/indexr.shtml
www.enchantedlearning.com/inventors/indexr.shtml
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Astronomy glossary explains basic astronomical terms, R. ... ; A refracting telescope uses two lenses which magnify what is viewed; the large primary lens does most of the magnification. The first refracting telescope was invented by Hans Lippershey in 1608.
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www.enchantedlearning.com/subjects/astronomy/glossary/i...
www.enchantedlearning.com/subjects/astronomy/glossary/indexr.shtml
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Name a galaxy | real galaxies from real astronomers ... This means that there is a practical limit to the size of a refracting telescope since the larger a the lens at the front gets, the more the likelihood of the lens distorting do to it sagging from gravity distorting it's shape (or figure).
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www.wpo.net/astrotales/newton3.html
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galileo-galilei.org...
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www.galileo-galilei.org/galileo-telescope.html
www.galileo-galilei.org/galileo-telescope.html
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