Difference between revisions 1815479 and 1815486 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==
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A '''reflecting telescope''' (also called a '''reflector''') is an [[w:optical telescope|optical telescope]] which uses a single or combination of [[w:curved mirror|curved mirror]]s that reflect [[w:light|light]] and form an [[w:image|image]].
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==Catadioptric telescopes==
{{main|Instruments/Telescopes/Catadioptrics|Catadioptric telescopes}}
'''Def.''' 
“optical systems that employ both refractive (dioptric) and reflective (catoptric) elements are called '''catadioptric optical systems'''.

'''Def.''' the construction and use of catadioptric lenses and systems is called '''catadioptrics'''.

==Dobsonian telescopes==
{{main|Instruments/Telescopes/Dobsonians|Dobsonian telescopes}}
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