Assertion: ellipse's form | /r/CapableOf | converge on other focus
Facets:
Source sentences:
text: The reflectors for antennae and acoustic devices are made in elliptical shape to take advantage of the fact that any emission form a focus will converge on the other focus.
text: The reflectors for antennae and acoustic devices are made in elliptical shape to take advantage of the fact that any emission form a focus will converge on the other focus.