Assertion: eyepiece's lens | /r/CapableOf | place convex sides
Facets:
value: at a separation
type: TRANSITIVE-OBJECT
value: toward one another
type: TRANSITIVE-OBJECT
Source sentences:
text: The centuries-old Ramsden eyepiece, composed of two identical plano-convex lenses placed convex sides toward one another at a separation equal to their focal length, has essentially no lateral color.