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Originally Posted by tlbs101
I propose 2 experiments to show that by (nearly) instantaneously removing a mass from an area of space, that the warped space will not only "spring" back to normal, but "overshoot" and become rarified, as if a negative mass existed in the same space, for a short time.
If that virtual negative mass occupies the same space as a positive mass (of which some had been instantaneously converted to energy), the two masses might cancel to zero. If that is the case, then infinite acceleration is possible, hence FTL is possible.
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Okay, what i say to the first paragraph is that to do this instant removing of mass, im guessing a singularity would be needed or antimatter even though im not sure if what's emmited would leave mass or not.
The removal of mass quick enough could result in a whipping effect in a normal substance but we dont know if space-time works like that or not. So if you took out 1000 tons of matter (exaple not a real amount could be 1 gram or a billion tons) from our sun in an instant by singularity or anti-matter or how ever you propose it would go nova from instability of the gravity and explosive force. Nova's happen near the speed of light as its a hydrogen and helium plasma, your proposal would make it so that a star could go nova or super nova faster then the speed of light and in theory destroy things in the past.
I think this breaks causality in our universe you cant have an effect proceeding a cause, this is why traveling faster then the speed of light is impossible. Its the grand-father paradox, which the universe may have an inbuilt protection against it. One theory is that how ever unprobable an accident happening it will, so say their was a 1 in a billion chance that shooting your grand-father from point blank in the head could back fire it would instead of killing him and you'd end up unable to kill him. or your time machine would break.
I think FTL travel is impossible to achieve especialy at our present state. But another theory is that if you did shoot your grand-father that history would rewrite so your grand-mother had an affair and your dad wasn't your grand-fathers son. If this is true then your theory would be possible but im not sure at all probbable.