( ( ( ( ( ( In ( visible light ) ) ( ( the fields ) ( change ( direction ( ( ( about 1.000.000.000.000.000 ) times ) ( per second ) ) ) ) ) ) , ) and ) ( ( the ( exact frequency ) ) ( determines ( ( the color ) ( of ( the light ) ) ) ) ) ) . )
(ROOT (S (S (PP (IN In) (NP (JJ visible) (NN light))) (NP (DT the) (NNS fields)) (VP (VBP change) (NP (NP (NN direction)) (PP (NP (QP (RB about) (CD 1.000.000.000.000.000)) (NNS times)) (IN per) (NP (NN second)))))) (, ,) (CC and) (S (NP (DT the) (JJ exact) (NN frequency)) (VP (VBZ determines) (NP (NP (DT the) (NN color)) (PP (IN of) (NP (DT the) (NN light)))))) (. .)))
In visible light the fields change direction about 1.000.000.000.000.000 times per second, and the exact frequency determines the color of the light.
(ROOT (S (NP (JJ Exact) (NN wavelength)) (VP (VBZ determines) (NP (NP (DT the) (NN color)) (PP (IN of) (NP (JJ visible) (NN light))))) (. .)))