Can you clearly define what a ghost is? Are they made of matter, like we are? Do they emit light or reflect it? Are they able to leave any sort of physical evidence?
@BlueSkyKing No, Ghost is not made of matter like we all are made of.
I tell you in Brief, ...Okay
So, we have 3 bodies, ..I mean Every Human has 1. Physical body 2. Subtle body 3. Casual body and 4th thing is your " Soul "
So, After the death of a human, his or her subtle body + casual body wanders in search of peace or pleasure.....those subtle bodies are called " Ghost "
@BlueSkyKing If you are a Christian then you will never get to know, Your religion can't explain it...I know it but I will have to write like 10-15 pages to make you understand.
I tell you in very Brief: " Sour or spirit " is just a form of Energy and A soul needs a Carrier that is your subtle body.