( ( The ( ( visible light ) spectrum ) ) ( ( covers ( ( the wavelengths ) ( that ( can ( be ( seen ( by ( the ( human eye ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (ADJP (JJ visible) (JJ light)) (NN spectrum)) (VP (VBZ covers) (NP (NP (DT the) (NNS wavelengths)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB be) (VP (VBN seen) (PP (IN by) (NP (DT the) (JJ human) (NN eye)))))))))) (. .)))
The visible light spectrum covers the wavelengths that can be seen by the human eye.
(ROOT (S (NP (JJ Visible) (NN light)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT the) (NNS wavelengths)) (PP (IN of) (NP (JJ light) (NNS humans))))) (SBAR (S (VP (MD can) (VP (VB see))))))) (. .)))