( ( ( The opposite ) ( of this ) ) ( ( is ( when ( ( the ( two waves ) ) ( ( create ( deconstructive interference ) ) ( essentially ( ( canceling out ) ( the waves ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN opposite)) (PP (IN of) (NP (DT this)))) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (CD two) (NNS waves)) (VP (VBP create) (NP (JJ deconstructive) (NN interference)) (S (ADVP (RB essentially)) (VP (VBG canceling) (PRT (RP out)) (NP (DT the) (NNS waves)))))))) (. .)))
The opposite of this is when the two waves create deconstructive interference essentially canceling out the waves.
(ROOT (S (NP (JJ Constructive) (NN interference)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (CD two) (NNS waves)) (VP (VBP combine) (S (VP (TO to) (VP (VB create) (NP (DT a) (JJR larger) (NN wave))))))))) (. .)))