Hey Fred. I'm not in any way saying that you arent right about this. I also used to think that a ghost would not block light BUT ..... of course I have been watching all the paranormal shows on TV for the past 2 or 3 years now and on several of them I notice that they have videoed what they believe to be apparitions that have blocked the light. Some of them have recieved national attention and are thought to be way up on the charts as some of the "Best Evidence" of paranormal existence. There are 2 shows that come to mind emediately....Ghost Hunters and Ghost Adventures.
Ghost Adventures is the new show that is in it's first season however they showed the entire documentary last year. It has since been cut up into hour long segments and used as the first installments of a new paranormal telivision show. I didn't have any chemistry with the guy who was in charge of making the documentary. He gets on my nerves severely BUT.... I have to say that I was highly impressed at the footage they were able to catch while making the documentary. Has anyone seen the footage of the brick that they filmed being thrown across the room and then later the EVP that was captured when the guys went back with another group. They were talking about how the spirit there might be non-human or evil because it tried to hurt them and could have killed them with the brick? The EVP then stated that it wasn't trying to hurt anyone....just was doing what they kept begging it to do which was to make it's presence known. Great stuff huh.
Well they also captured an apparition following one of the guys around a different building at a different investigation. That video has gotten a lot of media coverage and was sited by CNN as very convincing towards proof of the paranormal. That aparition blocked the light but not fully. It actually "dimmed" the light so I'm not sure if u can count on that anymore. It seems that there may not be a steadfast rule for this when it comes to aparitions.