Difference between revisions 1583266 and 1583317 on enwikiversity

[[Image:Brorfelde Schmidt Telescope.jpg|thumb|right|200px|The Schmidt Telescope at the former Brorfelde Observatory is now used by amateur astronomers. Credit: [[commons:User:Moeng|Mogens Engelund]].]]
A '''radiation telescope''' is an instrument designed to collect and focus radiation so as to make distant sources appear nearer.
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==Astronomy==
{{main|Astronomy}}
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|accessdate=2012-07-07 }}</ref>

Detectors such as the X-ray detector at right collect individual X-rays (photons of X-ray light), count them, discern the energy or wavelength, or how fast they are detected. The detector and telescope system can be designed to yield temporal, spatial, or spectral information.
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==Image processors==
{{main|Instruments/Telescopes/Image processors|Image processors}}
'''Def.''' 
“[a]"any form of information processing for which both the input and output are images”, after Wiktionary [[wikt:image processing|"<ref name=ImageProcessingWikt>{{ cite web
|author=[[wikt:User:Jaaari|Jaaari]]
|title=image processing, In: ''Wiktionary''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=20 February
|year=2007
|url=https://en.wiktionary.org/wiki/image  _processing]],⏎
|accessdate=2016-07-14 }}</ref> is called '''image processing'''.

'''Def.''' “[a] representation of anything ... upon canvas, paper, or other surface”, after Wiktionary [[wikt:picture|picture]],<ref name=PictureWikt>{{ cite web
|title=picture, In: ''Wiktionary''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=9 July
|year=2016
|url=https://en.wiktionary.org/wiki/picture
|accessdate=2016-07-14 }}</ref> is called a '''picture'''.

'''Def.''' a “"representation of a real object”, after Wiktionary [[wikt:image|image]]"<ref name=ImageWikt>{{ cite web
|author=[[wikt:User:Emperorbma|Emperorbma]]
|title=image, In: ''Wiktionary''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=1 December
|year=2004
|url=https://en.wiktionary.org/wiki/image
|accessdate=2016-07-14 }}</ref> is called an '''image'''.

'''Def.''' “"[t]he set of points that map to a given point (or set of points) under a specified function”, from Wiktionary [[wikt:inverse image|"<ref name=InverseImageWikt>{{ cite web
|author=[[wikt:User:Msh210|Msh210]]
|title=inverse image, In: ''Wiktionary''
|publisher=Wikimedia Foundation, Inc
|location=San Francisco, California
|month=23 December
|year=2009
|url=https://en.wiktionary.org/wiki/inverse  _image]],⏎
|accessdate=2016-07-14 }}</ref> is called an '''inverse image'''.

“"Under the function given by <math>f(x)=x^2</math>, the '''inverse image''' of 4 is <math>\{-2,2\}</math>, as is the '''inverse image''' of <math>\{4\}</math>”, after Wiktionary [[wikt:inverse image|i."<ref name=Inverse iImage]].Wikt/>

A telescope's "imaging system's resolution can be limited either by [[w:Optical aberration|aberration]] or by [[w:diffraction|diffraction]] causing [[w:Focus (optics)|blurring]] of the image. These two phenomena have different origins and are unrelated. Aberrations can be explained by geometrical optics and can in principle be solved by increasing the optical quality — and cost — of the system. On the other hand, diffraction comes from the wave nature of light and is determined by the finit(contracted; show full)[[Category:Materials sciences/Lectures]]
[[Category:Physics and Astronomy]]
[[Category:Radiation astronomy/Lectures]]
[[Category:Resources last modified in July 2016]]
[[Category:Technology/Lectures]]
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