Assertion: wave | /r/CapableOf | reinforce each other
Facets:
value: in some directions
type: LOCATION
Source sentences:
text: The waves from two or more centres of disturbance may reinforce each other in some directions and cancel in others.
text: Intermediate situations arise in those directions in which the distances traveled by the two waves differ by some other fraction of a wavelength, the waves tending either to reinforce or to cancel each other.