Hello all, first post here.
I have a question for all those who claim to have taken pictures and noticed nothing at the time with the naked eye, develop film only to claim that WALLA a ghost was present with proof being some sort of anamoly in the picture. I am wondering how this is possible.
From my understanding, when you take a picture you are in short taking a chemical record of visible light patterns. Chemical compenets in the film, Silver Halide Salts, are tiny light-sensitive grains, spread out in a chemical suspension on a strip of plastic. When exposed to light, the grains undergo a chemical reaction creating an Image. In short if there is no light source you will not get an image, thus if if you cannot see the ghost with your eye, (emitting some sort of light) it WOULD NOT show on film either.
You may claim that perhaps the ghost is emitting another type of electromagnetic raditation that our eyes cannot pick up, but the film can. Again im not sure which one it would be as Infra red, Ultra violet, Microwaves, and Radiowaves envelop us nearly every second. If you say that ghosts are emitting oneof these , and that the film is reacting to it, then wouldn't ALL film come out blurry as these waves are always present.
Also in order for film to detect infrared or ultra violet waves, a special dye must be added to the Silver Halide crystals, so I do not see how regular film, untreated with these special dyes, could even capture infra red or ultra violet light waves. The same goes for X-rays, in order to capture these it takes a very intricate process.
If an image is captured on film, it must have emitted some visible light as the entire photgraphic process is dependant on chemical reations put in motion by visible light. If an object emitted light it more than likely would have been seen by the human eye.
So my question again how can you take a picture, claim to see nothing at the time out of the ordinary with your own eyes, then upon developing proclaim to have captured a ghost? . Or better yet, claim to have captured a hallucination on film, as such was proposed as the in the photograph of the "Spirit bear".
Any reasonable ideas would be appreciated.