QM I agree I don't understand, still trying to get my head around Ψ before there is a collapse of the wave function..
As for photons - energy can neither be created nor destroyed etc... photon gets absorbed into particle, that particle will decay. At some point the bugger will come out again...
So this may get long winded..
All of existence, as being described by physics works on a principle of relativity - nothing is really there unless an observer is present to measure an event (Special relativity, general relativity, even relational quantum mechanics). Events are dependent on the...