REFRACTOR - translation to αραβικά
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REFRACTOR - translation to αραβικά

TYPE OF OPTICAL TELESCOPE
Refractor; Refractor telescope; Refractive telescope; Galilean Telescope; Refracting Telescope; Galilean telescope; Keplerian telescope; Keplerian Telescope; Refractor Telescope; Kepler refractor; Galileo Telescope; Galileo's telescope; Refractory telescope
  • The Apochromatic lens usually comprises three elements that bring light of three different frequencies to a common focus
  • The Yerkes Great refractor mounted at the 1893 World's Fair in Chicago; the tallest, longest, and biggest aperture refractor up to that time.
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  • This 12 inch refractor is mounted in a dome on a mount that matches the Earth's rotation
  • Astronaut trains with camera with large lens
  • Vienna University Observatory]]
  • Touristic telescope pointed to Matterhorn in Switzerland
  • The Greenwich 28-inch refractor is a popular tourist attraction in 21st century London
  • Alvan Clark polishes the big Yerkes achromatic objective lens, over 1 meter across, in 1896.
  • in}} refractor, at [[Yerkes Observatory]], the largest achromatic refractor ever put into astronomical use (photo taken on 6 May 1921, as Einstein was visiting)
  • A 200 mm diameter refracting telescope at the [[Poznań Observatory]]

REFRACTOR         

ألاسم

اِنْكِسارُ الضَّوْء

refractor         
كاسر
refractor         
كاسِر

Ορισμός

Refractor
·noun Anything that refracts.
II. Refractor ·noun A refracting telescope, in which the image to be viewed is formed by the refraction of light in passing through a convex lens.

Βικιπαίδεια

Refracting telescope

A refracting telescope (also called a refractor) 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 originally used in spyglasses and astronomical telescopes but is also used for long-focus camera lenses. Although large refracting telescopes were very popular in the second half of the 19th century, for most research purposes, the refracting telescope has been superseded by the reflecting telescope, which allows larger apertures. A refractor's magnification is calculated by dividing the focal length of the objective lens by that of the eyepiece.

Refracting telescopes typically have a lens at the front, then a long tube, then an eyepiece or instrumentation at the rear, where the telescope view comes to focus. Originally, telescopes had an objective of one element, but a century later, two and even three element lenses were made.

Refracting telescope is a technology that has often been applied to other optical devices, such as binoculars and zoom lenses/telephoto lens/long-focus lens.

Παραδείγματα από το σώμα κειμένου για REFRACTOR
1. Stellarvue SV'0T '0mm Apochromatic Refractor In terms of both image quality and portability, you can‘t beat an apochromatic refractor.
2. My Stellarvue '0mm refractor is small enough to carry onto airplanes or dash out into the backyard for a quick observing session, but its three–element '0mm diameter objective lens can pull in terrific detail like cloud patterns on Jupiter and subtle divisions within the rings of Saturn.