Assertion: convex lens | /r/CapableOf | produce an image of an object
Facets:
value: at their focus
type: LOCATION
Source sentences:
text: Convex lenses produce an image of an object at infinity at their focus; if the sun is imaged, much of the visible and infrared light incident on the lens is concentrated into the small image.
text: Convex lenses produce an image of an object at infinity at their focus; if the sun is imaged, much of the visible and infrared light incident on the lens is concentrated into the small image.