Cursed slow dial connection! And Switch the times around and that equation works.
Now, I believe that traveling into the past becomes a plausible notion is when you deal with advanced wave propagation. The physics are this:
Whenever you send a radio wave out there are actually two waves being created: the retarded wave and the advanced wave. When you flip on the radio, you are listening to the stronger retarded waves--they go from point A to point B at c. Your advanced wave goes from A to B at -c, and since there are no negative distances in the universe, the wave actually moves backwards in time.
When these advanced waves hit some highly energized gas (like a solar emmisions) the gas resends the advanced wave as a retarded wave, and it loses amplitude in the transfer. Now the reason you cant turn on your radio and start jamming to 95 WILL rock from 2015 is because these advanced waves cancel themselves out when they travel back towards Earth.
I say figure out how to work quantum theory to own's side by making a radio with only advanced waves, rid the system of the retarded waves. This gives one the chance to send messages back in time. But you can never send a message back before your radio was made, unless you can work sending signals through already existing matter which I can scarcely guess as to how you can do that. But if you can do that, there is no stopping one from then using advanced waves on yourself, send your memories and mind back through your brain to an earlier date, and relive your life from that point.
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