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A telescope is an instrument designed for the observation of remote objects and the collection of s, but there are telescopes that operate in other regions of the Electromagnetic Spectrum . __TOC__ TYPES OF TELESCOPE The name "telescope" covers a wide range of instruments and is difficult to define. They all have the attribute of collecting electromagnetic radiation so it can be studied or analyzed in some manner. The most common type is the optical telescope. Other types also exist and are listed below. Optical telescopes .]] See Also: Optical telescope An optical telescope gathers and Focus es light mainly from the visible part of the Electromagnetic Spectrum (although some work in the Infrared and Ultraviolet ). Optical telescopes increase the apparent Angular Size of distant objects, as well as their apparent Brightness . Telescopes work by employing one or more curved optical elements - Lenses or Mirror s - to gather light or other electromagnetic radiation and bring that light or radiation to a Focus , where the image can be observed, photographed or studied. Optical telescopes are used for Astronomy and in many non-astronomical instruments including '' Theodolite s'', '' Transits '', '' Spotting Scope s'', '' Monocular s'', '' Binoculars ,'' '' Camera Lens es'', and ''spyglasses''. There are three main types:
Radio telescopes .]] See Also: Radio telescope Radio telescopes are (arrays of optical telescopes) and Aperture Masking Interferometry at single reflecting telescopes. X-ray and gamma-ray telescopes X-ray and Gamma-ray telescopes have a problem because these rays go through most metals and glasses. Some x-ray telescopes use ring-shaped "glancing" Mirror s, made of Heavy Metals , that reflect the rays just a few Degree s. The mirrors are usually a section of a rotated Parabola . Gamma-ray telescopes give up on focusing entirely, and use coded aperture masks; the pattern of shadows the mask creates can be reconstructed to form an image. These types of telescopes are usually on Earth-orbiting Satellite s or high-flying balloons, since the Earth's Atmosphere is opaque to this part of the electromagnetic spectrum. (''see: X-ray Astronomy and Gamma-ray Astronomy '') with the Earth's atmospheric transmittance (or opacity) and the types of telescopes used to image parts of the spectrum.]] OTHER TYPES NOTABLE TELESCOPES at Socorro, New Mexico, United States.]]
SEE ALSO , Delaware, Ohio ]]
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