( ( Electron microscopes ) ( ( are ( useful ( for ( magnifying ( objects ( that ( are ( smaller ( than ( ( the wavelengths ) ( of ( visible light ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Electron) (NNS microscopes)) (VP (VBP are) (ADJP (JJ useful) (PP (IN for) (S (VP (VBG magnifying) (NP (NP (NNS objects)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (ADJP (JJR smaller)) (PP (IN than) (NP (NP (DT the) (NNS wavelengths)) (PP (IN of) (NP (JJ visible) (NN light))))))))))))))) (. .)))
Electron microscopes are useful for magnifying objects that are smaller than the wavelengths of visible light.
(ROOT (S (NP (DT A) (NN electron) (NN microscope)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB see) (NP (ADJP (RB extremely) (JJ small)) (NNS objects))))))) (. .)))