Assertion: lens | /r/HasProperty | convex
Facets:
Source sentences:
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.
text: A lens is biconvex (or double convex, or just convex) if both surfaces are convex.