yes there is a ghost........lets say what is atma ( it is energy...which means it canot be destroyed nor it can be created...but it can be distrubed for sure), when the energy gets into those negative vibe they become ghost....i havenot seen ghost but i have been called lot of time with name in nite from empty house or empty storeys.....i have answerd but later i realised ppl there is none. It is also the alter side of your positive side.......sometimes, never try to understand nature of law and rules....u cant get answer....let it go coz u will come back to ground zero