( ( If ( you ( can ( see ( ( the light ) ( being ( emitted ( from ( ( a ( visible ( wand 's ) ) ) tip ) ) ) ) ) ) ) ) ) ; )
(ROOT (SBAR (IN If) (S (NP (PRP you)) (VP (MD can) (VP (VB see) (NP (NP (DT the) (NN light)) (VP (VBG being) (VP (VBN emitted) (PP (IN from) (NP (NP (DT a) (JJ visible) (NN wand) (POS 's)) (NN tip))))))))) (: ;)))
If you can see the light being emitted from a visible wand's tip;
(ROOT (S (NP (PRP We)) (VP (VBP call) (NP (DT the) (JJ only) (NN light)) (SBAR (IN that) (S (NP (NNS people)) (VP (MD can) (VP (VB see) (NP (JJ visible) (NN light))))))) (. .)))