( ( Visible light ) ( ( ( is light ) ( that ( can ( be ( perceived ( by ( the ( human eye ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Visible) (NN light)) (VP (VBZ is) (ADJP (JJ light)) (SBAR (IN that) (S (VP (MD can) (VP (VB be) (VP (VBN perceived) (PP (IN by) (NP (DT the) (JJ human) (NN eye))))))))) (. .)))
Visible light is light that can be perceived by the human eye.
(ROOT (S (NP (PRP We)) (VP (VBP call) (NP (DT the) (JJ only) (NN light)) (SBAR (IN that) (S (NP (NNS people)) (VP (MD can) (VP (VB see) (NP (JJ visible) (NN light))))))) (. .)))