I apologise, as I always seem to be quoting other people in reply to your threads, but most of your questions have been answered pretty comprehensibly, in your own threads. I draw your attention to the thread you created entitled https://www.physicsforums.com/showpost.php?p=1203679&postcount=7". And in particular, the following posts;is mass a form of energy or not?
All indecently by Zz. If there is anything that you don't understand, please feel free to ask specific questions. But just repeating or restating your original question, over and over, either in the same thread or different ones such as this isn't going to get you anywhere. You won't gain any understanding and the people replying to your threads are just going to become more frustrated. I urge you (as cristo did in the above thread) to read the thread carefully and pay particular attention to the posts I outlined above.
The important point to note from Chris' excellent post above; is that you are attempting to reconcile two theories, QFT and GR, which as yet have been found to be incompatible. The photon has no place (as yet) in GR and curved space time.Essential caveat: as you probably know, quantum theory has proven hard to reconcile with the curved spacetime models used in general relativity, so it is currently difficult to say very much with certainty about how photons and other particles might be treated in the yet unknown quantum theory of gravity.
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