what if, all mass in the universe was "pulvarized"(heh, had to use the word) to EM radiation? if there was enough antimatter somewhere and we found a way to get them to one place and for some strange possibly fundamentaly religious reasons decide to annihilate all mass in the universe to EM radiation.

i imagine this EM radiation would have no dimension and no spacetime, it would simply be 1 infinitely small dimensionless point containing all the energy of the universe. i believe this is the point of time reversal - at point of unity. unity can never exist, because that would mean energy came to be from nothing.

what if, all mass in the universe was "pulvarized"(heh, had to use the word) to EM radiation? if there was enough antimatter somewhere and we found a way to get them to one place and for some strange possibly fundamentaly religious reasons decide to annihilate all mass in the universe to EM radiation.

Then we'd have a universe full of EM radiation.

i imagine this EM radiation would have no dimension and no spacetime, it would simply be 1 infinitely small dimensionless point containing all the energy of the universe.

Why? Creating EM radiation doesn't destroy space.

i believe this is the point of time reversal - at point of unity.

Huh?

unity can never exist, because that would mean energy came to be from nothing.

double huh?

destroying mass destroys its spacetime.
so, we'd have no space or time.

EM radiation is dimensionless.
mass creates the space time around it. EM raditation exists in it and appears to us as the spacetime dictates. if theres no space time all EM radiation would have no dimensions to be in.

so, there'd be no universe. and just maybe all this radiation in a dimensionless spot would just do another big bang?

destroying mass destroys its spacetime.
Why do you think that? I'm not sure if spacetime is meaningful without energy, but to spacetime mass and energy are the same thing.

well they are in some way, we have yet to grasp how and why what we perceive as dimensionality is manifested.
it is very difficult though as we are a small dot in the whole thing and our perception is that everything is flat and should fit into the cartesian coordinate system etc. similar to the way we thought earth was flat simply because.. well it just looks like that as we could not observe it whole.

Yes, it is clear that if spacetime exists in some higher order manifold in which other entities exist that there will be problems in perceiving those entities... but that doesn't seem to have any bearing on the idea that "destroying mass destroys its spacetime".