( ( ( ( ( ( ( ( ( ( Electromagnetic waves ) , ) ( geometrical ( and ( physical optics ) ) ) ) , ) photons ) , ) ( photoelectric effect ) ) , ) ( blackbody radiation ) ) . )
(ROOT (NP (NP (JJ Electromagnetic) (NNS waves)) (, ,) (NP (JJ geometrical) (CC and) (JJ physical) (NNS optics)) (, ,) (NP (NNS photons)) (, ,) (NP (JJ photoelectric) (NN effect)) (, ,) (NP (JJ blackbody) (NN radiation)) (. .)))
Electromagnetic waves, geometrical and physical optics, photons, photoelectric effect, blackbody radiation.
(ROOT (S (NP (NNS Optics)) (VP (VBZ explains) (NP (NP (DT the) (NN behavior)) (PP (IN of) (NP (JJ visible) (ADJP (JJ light) (CC and) (JJ electromagnetic)) (NNS waves))))) (. .)))