Assertion: lens's surface | /r/HasProperty | convex
Facets:
Source sentences:
text: Each surface can be convex (bulging outwards from the lens), concave (depressed into the lens), or planar (flat).
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: The signs of the lens' radii of curvature indicate whether the corresponding surfaces are convex or concave.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: Each surface can be convex (bulging outwards from the lens), concave (depressed into the lens), or planar (flat).
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: The signs of the lens' radii of curvature indicate whether the corresponding surfaces are convex or concave.