( ( The light ) ( ( can ( be ( ( ( reflected and ) refracted ) ( until ( it ( reaches ( ( ( a ( diffuse surface ) ) , ) ( where ( it ( is deposited ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN light)) (VP (MD can) (VP (VB be) (VP (VBN reflected) (CC and) (VBN refracted) (SBAR (IN until) (S (NP (PRP it)) (VP (VBZ reaches) (NP (NP (DT a) (JJ diffuse) (NN surface)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBZ is) (ADJP (JJ deposited)))))))))))) (. .)))
The light can be reflected and refracted until it reaches a diffuse surface, where it is deposited.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN light)) (VP (VBZ reflects) (PP (IN from) (NP (DT a) (JJ rough) (NN surface)))))) (, ,) (NP (PRP it)) (VP (VBZ gets) (ADJP (JJ diffused))) (. .)))