( ( Whenever ( ( a ( charged particle ) ) oscillates ) ) ( , ( it ( ( emits ( ( electromagnetic waves ) ( of ( its own ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB Whenever)) (S (NP (DT a) (JJ charged) (NN particle)) (VP (VBZ oscillates)))) (, ,) (NP (PRP it)) (VP (VBZ emits) (NP (NP (JJ electromagnetic) (NNS waves)) (PP (IN of) (NP (PRP$ its) (JJ own))))) (. .)))
Whenever a charged particle oscillates, it emits electromagnetic waves of its own.
(ROOT (S (NP (JJ Electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN created) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))