Assertion: newtonian telescope's design | /r/CapableOf | employ single front surface mirror
Facets:
value: as its objective
type: MANNER
Source sentences:
text: And since the design employs a single front surface mirror as its objective it only has one surface that has to be ground and polished, as opposed to three for the Maksutov and four for the refractor and the Schmidt–Cassegrain.