He only turns invisible to living creatures. When he puts on the ring he actually goes into a shadow realm where the witchking and the other ringwraiths can see him along with the creator of the ring Sauron.
1 year ago
Last edited at 8:40AM on 6/23/2011
He does turn invisible but he also becomes visible to the Dark Lord. He enters a sort of parallel universe where he is still in Middle Earth but he is also partly in the realm of Murdor and the Dark Lord and his minions can see him. So he is invisible to the people on Middle Earth but not to the dark riders who are searching for the one ring. It is interesting to note that electrons actually behave the same way in certain instances. This is one of the reasons we theorize that parallel universes do in fact exist. When an electron changes energy levels it mysteriously disappears from one energy level and then miraculously appears at the new energy level. As of yet, science is unable to explain how this happens and one theory is that the electron temporarily travels to a parallel universe and then back again. Many of our science fiction writers discover science way before the scientists do. For instance, Arthur C. Clarke (2001, a Space Odyssey and others) invented the modern satellite way before space exploration was ever a reality. Science Fiction often parallels science fact.