The inevitable development of time from the past to the longer term resembles another indomitable law of nature: entropy. That’s the iron law of thermodynamics that states that closed techniques go from ordered to disordered. (This regulation explains why an egg will never simply occur to unscramble itself if you happen to leave it alone lengthy enough). Is time linked to entropy? Maybe, but that is the topic of another article….
Using gravity would also be lethal. To expertise time dilation, one might stand on a neutron star , but the forces a person would experience would rip you apart first. Prof Greene explains in his Big Think video: You hang out next to a black hole for some time, you come again, get out of your ship and it will be any number of years into the future, whatever you need all relying on how shut you got to the sting of the black gap and the way long you hung on the market.
The floor on the Schwarzschild radius known as the event horizon. Crossing the occasion horizon is saying goodbye to that region of spacetime perpetually. The chance of backward time journey is because of the chance that the black hole might empty out into another area of spacetime. Another area of area and another time, presumably the previous. Have we uncovered some proof that time travel really exists? See girls on mobile phones within the Nineteen Twenties and uncanny movie star doppelgangers from the 1800s.
So Bob’s mass would change into infinite at c. Also it will take an infinite amount of energy to accelerate Bob to c. So Bob, and any other particle with mass, might get arbitrarily close to c but might never reach or exceed it. There is one loophole within the equations that does allow things to be traveling sooner than c. If such a particle existed it would have to have been created moving faster than c and it might by no means travel at c or slower. Such theoretical particles are referred to as tachyons and would journey backward in time. But Bob isn’t a tachyon so there’s no hope there.