( ( Thomson ( ( scattering ( of ( electromagnetic waves ) ) ) by ) ) ( ( charged particles ) . ) )
(ROOT (S (NP (NP (NNP Thomson)) (VP (VBG scattering) (PP (IN of) (NP (JJ electromagnetic) (NNS waves))) (PP (IN by)))) (VP (VBD charged) (NP (NNS particles))) (. .)))
Thomson scattering of electromagnetic waves by charged particles.
(ROOT (S (NP (JJ Electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN created) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))