Assertion: reflecting telescope's mirror | /r/HasAspect | reflecting surface
Facets:
Source sentences:
text: A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light).
text: Because mirrors have only one reflective surface, they are easier to construct than lenses, which are made from optical glass, and cannot have any occlusions because light must pass completely through them.
text: A concave mirror, or converging mirror, has a reflecting surface that is recessed inward (away from the incident light).