Assertion: newtonian telescope's mirror | /r/CapableOf | reflect light cone
Facets:
value: back through that perforation
type: OTHER
value: from the primary mirror
type: LOCATION
value: to the outside of the scope
type: LOCATION
Source sentences:
text: The secondary mirror reflects the light cone from the primary mirror back through that perforation to the outside of the scope, and through a focus mechanism to the eyepiece used to view the image.