( ( If ( ( ( ( the displacement ) and ) ( the wave ) ) ( ( move ( at ( right angles ) ) ) ( to ( each other ) ) ) ) ) ( , ( ( the wave ) ( ( is transverse ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (NP (DT the) (NN displacement)) (CC and) (NP (DT the) (NN wave))) (VP (VBP move) (PP (IN at) (NP (JJ right) (NNS angles))) (PP (TO to) (NP (DT each) (JJ other)))))) (, ,) (NP (DT the) (NN wave)) (VP (VBZ is) (ADJP (JJ transverse))) (. .)))
If the displacement and the wave move at right angles to each other, the wave is transverse.
(ROOT (S (SBAR (IN Because) (S (NP (NP (DT the) (NNS fields)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (DT an) (JJ electromagnetic) (NN wave)))))) (VP (VBP are) (PP (IN at) (NP (NP (JJ right) (NNS angles)) (PP (PP (TO to) (NP (DT each) (JJ other))) (CC and) (PP (TO to) (NP (DT the) (NN direction)))))) (SBAR (IN that) (S (NP (DT the) (NN wave)) (VP (VBZ travels))))))) (, ,) (NP (DT an) (JJ electromagnetic) (NN wave)) (VP (VBZ is) (VP (VBN considered) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN transverse) (NN wave))))) (. .)))