( Wavelength ( ( is ( ( the distance ) ( measured ( along ( ( ( ( the line ) ( of propagation ) ) , ) ( between ( ( the crests ) ( of ( ( two ( adjacent waves ) ) ( -LRB- ( ( Figure 1 ) -RRB- ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Wavelength)) (VP (VBZ is) (NP (NP (DT the) (NN distance)) (VP (VBN measured) (PP (IN along) (NP (NP (DT the) (NN line)) (PP (IN of) (NP (NN propagation))) (, ,) (PP (IN between) (NP (NP (DT the) (NNS crests)) (PP (IN of) (NP (NP (CD two) (JJ adjacent) (NNS waves)) (PRN (-LRB- -LRB-) (NP (NN Figure) (CD 1)) (-RRB- -RRB-))))))))))) (. .)))
Wavelength is the distance measured along the line of propagation, between the crests of two adjacent waves (Figure 1).
(ROOT (S (NP (NNP Wavelength)) (VP (VBZ is) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (NP (CD two) (JJ corresponding) (NNS points)) (PP (IN of) (NP (NP (JJ adjacent) (NNS waves)) (VP (VBN called)))))))) (. .)))
Wavelength is the distance between two corresponding points of adjacent waves called.