( ( INTERFERENCE ( Constructive interference ) ) ( ( occurs ( at ( ( a point ) ( when ( ( two waves ) ( ( ( meet ( there ( ( crest-to-crest and ) trough-to-trough ) ) ) , ) ( thus ( reinforcing ( each other ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP INTERFERENCE) (NNP Constructive) (NN interference)) (VP (VBZ occurs) (PP (IN at) (NP (NP (DT a) (NN point)) (SBAR (WHADVP (WRB when)) (S (NP (CD two) (NNS waves)) (VP (VBP meet) (S (NP (EX there)) (ADJP (JJ crest-to-crest) (CC and) (JJ trough-to-trough))) (, ,) (S (ADVP (RB thus)) (VP (VBG reinforcing) (NP (DT each) (JJ other)))))))))) (. .)))
INTERFERENCE Constructive interference occurs at a point when two waves meet there crest-to-crest and trough-to-trough,thus reinforcing each other.
(ROOT (S (NP (PRP You)) (VP (VBP call) (SBAR (S (NP (NP (DT the) (ADJP (JJ high) (CC and) (JJ low)) (NNS points)) (PP (IN of) (NP (JJ transverse) (NNS waves)))) (VP (VP (VBZ crests)) (CC and) (VP (VBZ troughs)))))) (. .)))