Newtonian telescope - Wikipedia, the free encyclopedia
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The Newtonian telescope is a type of reflecting telescope invented by the British scientist Sir Isaac Newton (1643-1727), using a concave primary mirror and a flat diagonal secondary mirror. Newton’...
en.wikipedia.org/wiki/Newtonian_telescope
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The following figure illustrates the principle of reflection: the angle of incidence (measured from the perpendicular to the reflecting surface) is equal to the angle of reflection. The right side of the figure illustrates the use of a mirror to make a reflecting telescope.
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csep10.phys.utk.edu/astr162/lect/light/reflecting.html
csep10.phys.utk.edu/astr162/lect/light/reflecting.html
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Optical telescopes may be divided into two general categories: (1) refracting telescopes that use lenses to gather and focus light, and (2) reflecting telescopes that use mirrors to accomplish the same purpose. ... Principle of refraction and the refracting telescope...
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csep10.phys.utk.edu/astr162/lect/light/refracting.html
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How Does a Reflecting Telescope Work? ... History of the Reflecting Telescope ... A Scottish astronomer, James Gregory, came up with the design for the reflecting telescope in 1663. Isaac Newton made the first model of the reflecting telescope in 1688. After Newton built the model, scientists discovered that better images...
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library.thinkquest.org/J0112188/refracting_and_reflecti...
library.thinkquest.org/J0112188/refracting_and_reflecting_telescopes.htm
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; A reflecting (or Newtonian) telescope uses two mirrors to magnify what is viewed. The reflecting telescope was first described by James Gregory in 1663...
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www.enchantedlearning.com/inventors/indexr.shtml
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Britannica online encyclopedia article on reflecting telescope, Reflectors are used not only to examine the visible region of the electromagnetic spectrum but also to explore both the shorter- and longer-wavelength regions adjacent to it (i.e., the ultraviolet and the infrared). ... major reference (in telescope (instrument):
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www.britannica.com/EBchecked/topic/495172/reflecting-te...
www.britannica.com/EBchecked/topic/495172/reflecting-telescope
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Sir Isaac Newton invented the reflecting telescope in 1668. ... Sir Isaac Newton; Sir Isaac Newton was an English scientist (1642 - 1727) who invented the reflecting telescope in 1668.
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inventors.about.com/library/inventors/blnewton.htm
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Hubble works on the same principle as the first reflecting telescope built in the 1600s by Isaac Newton. Light enters the telescope and strikes a concave primary mirror, which acts like a lens to focus the light.
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hubblesite.org/hubble_discoveries/hstexhibit/telescope/...
hubblesite.org/hubble_discoveries/hstexhibit/telescope/about.shtml
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