Assertion: lens's shape | /r/CapableOf | convert diverging front
Facets:
value: similarly
type: MANNER
value: into a flat one
type: OTHER
value: spherically
type: MANNER
Source sentences:
text: In order to convert a spherically expanding wavefront into a spherically converging one using only a single boundary between the constituent explosives, the boundary shape must be a paraboloid; similarly, to convert a spherically diverging front into a flat one, the boundary shape must be a hyperboloid, and so on.