I dont think physics explains life after death (yet). The body ("energy") dies, and that dead body turns into something else (dust).
But fortunately you dont need physics or science to believe in life after death: There is no evidence whatsoever that consciousness/awareness "dies"
when the body dies. People who believe that consciousness is a product of the brain will easily be led to believe that when the brain dies, then
but I contradict the science that says "consciousness is a product of the brain" for the simple reason that consciousness cannot BE something that
it can observe. you cannot observe something and be it at the same time. And since your awareness can observe the brain and the mind and its thoughts,
it cannot BE it. An analogy: Eyes cannot observe themselves, because they are themselves.
Therefore its not a stretch at all to assume that consciousness never dies.