( ( ( ( Discuss ( how ( ( ( the energy ) ( of ( emitted light ) ) ) ( is ( related ( to ( the ( energy levels ) ) ) ) ) ) ) ) ( of electrons ) ) ( in ( the ( emitting atoms ) ) ) ) . )
(ROOT (NP (NP (NP (NNS Discuss)) (SBAR (WHADVP (WRB how)) (S (NP (NP (DT the) (NN energy)) (PP (IN of) (NP (JJ emitted) (NN light)))) (VP (VBZ is) (VP (VBN related) (PP (TO to) (NP (DT the) (NN energy) (NNS levels)))))))) (PP (IN of) (NP (NNS electrons))) (PP (IN in) (NP (DT the) (VBG emitting) (NNS atoms))) (. .)))
Discuss how the energy of emitted light is related to the energy levels of electrons in the emitting atoms.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NNS electrons)) (VP (VB return) (PP (TO to) (NP (DT a) (JJR lower) (NN energy) (NN level)))))) (, ,) (NP (PRP they)) (VP (VBP emit) (NP (NP (DT the) (JJ excess) (NN energy)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NN light))))))) (. .)))