Assertion: mirror's surface | /r/HasProperty | concave
Facets:
value: with mirrors
type: OTHER
Source sentences:
text: Some dental mirrors use a concave surface to provide a magnified image.
text: With mirrors, the curved surface is referred to as either concave or convex depending upon whether the center of curvature occurs on the side of the reflecting surface or the opposite side.
text: Their surface was either concave or convex, and imperfections tended to distort the image.
text: If the reflecting surface is concave, the reflected beams will be convergent, at least to some extent and for some distance from the surface.
text: The surface may be either convex (bulging outward) or concave (recessed inward).