Assertion: telescope's lens | /r/HasProperty | convex
Facets:
value: in galileo’s telescope
type: LOCATION
Source sentences:
text: A refracting telescope uses a convex lens but has magnification limitations.
text: In Galileo’s telescope the objective lens was convex and the eye lens was concave
text: If a lens is convex or converging, it takes parallel light rays from a distant object and bends them so that they converge to a single point called the focal point.
text: It consisted of a convex and concave lens in a tube, and the combination magnified three or four times.