Assertion: telescope's mirror | /r/CapableOf | direct the light
Facets:
value: to the side of the tube
type: TRANSITIVE-OBJECT
value: from the primary
type: OTHER
value: near the top
type: LOCATION
Source sentences:
text: Near the top a small, diagonal secondary mirror directs the light from the primary to the side of the tube, where it's met by a conveniently placed eyepiece.
text: An eyepiece adapter containing either a flat mirror or prism that directs the light at a right angle to the optical axis.