What are ghosts made of?
Unlike popular film and media would have you believe, ghosts, as far as their actual physical make up are simply streams of free electrons projecting in a manner that would create a visual form or psychological impression similar to their previous living form, not some kind of slimy residual goo. This form, when projected onto a canvas of electromagnetic energy (or the subconscious mind) creates a viewable electromagnetic form which would be perceived as the ghost. These electron streams, when intertwined, show that the sum total of their integration which is a direct and potentially visible result on the electromagnetic spectrum which can be perceived by the human eye and then interpreted by the brain.