( ( Among ( visible ( light rays ) ) ) ( , ( you ( ( should ( know ( that ( ( red light ) ( has ( ( ( ( the ( longest wavelength ) ) , ) and ) ( violet ( the shortest ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Among) (NP (JJ visible) (NN light) (NNS rays))) (, ,) (NP (PRP you)) (VP (MD should) (VP (VB know) (SBAR (IN that) (S (NP (JJ red) (NN light)) (VP (VBZ has) (NP (NP (DT the) (JJS longest) (NN wavelength)) (, ,) (CC and) (NP (NP (NN violet)) (NP (DT the) (JJS shortest))))))))) (. .)))
Among visible light rays, you should know that red light has the longest wavelength, and violet the shortest.
(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))))) (. .)))