( ( Determine ( ( the orientation ) ( of ( lines ( of ( ( constructive interference ) ( between ( these ( two waves ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Determine) (NP (NP (DT the) (NN orientation)) (PP (IN of) (NP (NP (NNS lines)) (PP (IN of) (NP (NP (JJ constructive) (NN interference)) (PP (IN between) (NP (DT these) (CD two) (NNS waves))))))))) (. .)))
Determine the orientation of lines of constructive interference between these two 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))))))))) (. .)))