Space &time when Eienstein says is supose to true for universely every where with relation to gravitational constant. True if the time run forward. But at Black hol e&singularity its not work here is the place where time must be in reversal & Light cone theory is based on both sides of singularity . Similarly time space theory is not works when photons come out from sun it takes 40 thousands yrs for a photons to come out from sun. If so again light speed is 40 thousands time slow as compared then all calculations are not true for EMC2 in side of sun.we must think over all relavent aspects then.

That's right, the theory of Relativity does break down and stop working at singularities. There is a view now in science talked about by Lee Smolin that blackholes are actual the birth of new universes with new laws. So in other words, there is some continuity in time between subsequent black hole collapses and expansions of universes. The same may apply to any gravitational collapse, and if the sun is a black hole, it must also fill these criteria. E=mc^2 seems pretty solid currently by experiments. But I sometimes wonder about the notion of mass staying constant. That's what gets me when I think 'bout gr.

Well, everything is gravity/the relationship between heavier and lighter elements, so time is just that reaction between masses with different density.. It`s like when water runs downhill or when oil floats on top of water - even how photons are emitted out of the Sun`s core due do it`s immense mass. That is time, basically. If everything had the exact same mass and density, nothing would happen, it would just be there.

You are combining several unrelated concepts here. No one knows exactly what is going on in a singularity.

However, the process of stellar combustion is well understood and the time it takes photons to exit fits right in with modern physics. The thousands of years it takes photons to get out has little to do with space-time. It is merely the fact that the matter is so hot and compressed that the photons are constantly being absorbed and re-emitted by other atoms. It is a long and circuitous route indeed for a photon to get from the center of the sun to the exterior.