ABSTRACT
We have seen how an interval of time depends on your perspective in relativity. Less time will elapse for someone who accelerates to very high speeds or spends some time in a strong gravitational ‚eld. I have discussed how this provides us with a way of travelling into the future. Of course this cannot really be considered as cheating time. All we are doing is getting to the future more quickly. Think of it like those clever adverts on TV where someone is slowly munching through a chocolate bar while the rest of the world whizzes past at high speed. I have described how this sort of time travel is quite normal for subatomic particles, since they are the only objects capable of getting close to the speed of light. Thus the muons that are produced by cosmic rays are time travelling into the future (by a tiny fraction of a second) during their shortened journey through the Earth’s atmosphere.
