( ( In ( visible light ) ) ( , ( ( ( ( ( the violet ) ( is ( the ( shortest wavelength ) ) ) ) and ) ( ( the red ) ( is ( ( the longest ) ( that ( is ( visible ( to ( the eye ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (JJ visible) (NN light))) (, ,) (S (NP (DT the) (NN violet)) (VP (VBZ is) (NP (DT the) (JJS shortest) (NN wavelength)))) (CC and) (S (NP (DT the) (NN red)) (VP (VBZ is) (NP (NP (DT the) (JJS longest)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ visible) (PP (TO to) (NP (DT the) (NN eye)))))))))) (. .)))
In visible light, the violet is the shortest wavelength and the red is the longest that is visible to the eye.
(ROOT (S (NP (NN Violet) (CC and) (NN red)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (JJ visible) (NN light))))) (. .)))