spacetime

At the creation of a pair of entangled particles we can say that the time of creation for each photon is equal, that is for a pair of entangled photons p1 and p2 te1 = te2 = 0 where ten is the creation time of photon n. Here we’re going to use a slightly modified spacetime diagram, in this...

Warning: This is wild speculation from someone who probably doesn't know what he's talking about. Please link me to any resources that would set me straight. :) Cliffs Notes: Could the possibility of a fundamental resolution to the universe explain dark matter/energy? Something about the...

I need some help trying to understand why the graviton is postulated to exist in physics? I thought Special Relativity 'explains' gravity, that is Gravity is due to the shape and size of the universe? I have tried Wikipedia and Google but can't find exactly what I am looking for, I have read...

A question for those who know a lot more about physics, cosmology and philosophy than I do. I'm engaged in a discussion on another forum, and the topic has drifted to the idea of causality. My erstwhile opponent (who is a religious moderate with fundamental leanings, if that makes any sense -...

I pulled this from Max Tegmark's On the Dimensionality of Spacetime After reading it several times, I still not that I quite understand it. Right now I have two big questions: Are ellipticity, hyperbolicity, and ultrahyperbolicity fundamental properties of spacetime, not properties of...

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I understand that gravity is caused by the reaction of space-time to objects of mass. Which causes space-time to basically push in all directions against anything with mass in some attempt to even itself out. I also understand that when you move very fast your mass increases as does your affect...

I had a (semi-drunken) conversation with someone a few days ago about humanity's state of knowledge about the Universe. We both used to try and keep somewhat up-to-date on developments, in laymen terms, but as our conversation revealled, we have obviously let it lapse for way too long. :) One...

As always in my threads, it's important that the reader recognises the fact that the things we sense are not real in themselves, but are abstract representations of things. So, we see that Relativity is a theory which applies directly to the world we sense. But is there an absolute reality of...