Assertion: reflecting telescope's mirror | /r/HasProperty | reflecting telescope
Facets:
Source sentences:
text: If this was true then chromatic aberration could be eliminated by building a telescope that did not use a lens but instead used a mirror, a reflecting telescope.
text: However in the class of Optical Telescope there are two main designs, Those using mirrors (Reflecting Telescopes) and those using lenses (Refracting Telescopes).