The speed-of-light rule represents the backbone of Einstein’s 1905 special theory of relativity. Special relativity states that nothing can go faster than the speed of light. If something were to exceed this limit, it would move backward in time, according to the theory.
If the flow of time is backward for the entire universe including you, the observer, it’s business as usual.You can not observe any thing as you are also in backward time.
You would only notice it if you were in a bubble isolated from the rest of the universe – your bubble still following “normal” time while the rest of the universe “backward”.
An “effect” could travel back to a point before its “cause” had occurred.The baby will start swinging before the push to his swing.
Firstly I would like to emphasize that nothing is allowed to travel faster than c or the speed of light ( this holds true for any and all “inertial frames of references” ). What I mean to say is that the speed of any object that has a rest mass (greater than 0) is bound to travel at speeds lesser than c. (Just to make it obvious, photons have rest mass 0 and travel at c ).
According to Einstein’s famous equation, E = mc², mass and energy are the same physical entity and can be changed into each other. Because of this equivalence, the energy an object has due to its motion will increase its mass (mass is not constant). In other words, the faster an object moves, the greater its mass. This only becomes noticeable when an object moves really quickly. If it moves at 10 percent the speed of light, for example, its mass will only be 0.5 percent more than normal. But if it moves at 90 percent the speed of light, its mass will double.
As an object approaches the speed of light, its mass rises precipitously. If an object tries to travel 186,000 miles per second, its mass becomes infinite, and so does the energy required to move it. For this reason, no normal object can travel as fast or faster than the speed of light.
Fundamental particles known as tachyons which have an imaginary negative mass can travel faster than light and hence can be used to send signals in the past.But we have never observed a tachyonic particle in nature and the very existence of such a particle is a matter of speculation.
Extending the concept of time dilation as discussed in my previous post,if the object moves for a year at 200% of c then only few months would have passed on earth … and so you can see the weirdness that we come across while travelling faster than c .
Now this may give a sense of travelling in the past but its hard to explain the nature of the past since the time is having an imaginary unit attached … however there are ways to aggregate things and show that we can travel back in time (i guess ) …. furthermore time is a vector (with a forward arrow depicting its direction) unlike space and many speculate that travelling faster than light could reverse the arrow and allow us to travel back in time … Also relativity does not hold us from drawing out solutions that allow a similar phenomenon .
Can we escape the black hole…..when we are able to move with speed more than light? …..in next posting