[kj] Strange events - time travel

[Brendan]

So you could theoretcically go back in time, play David Bowie songs to
David Bowie before he wrote them, and then he could 'rip them off'...

I think by the fact that we haven't seen it happen, that it's either
theoretically impossible to travel back in time, or if it's possible there
are strict rules about it (probably involving 'enforcers' who look like
Jean Claude Van Damme who travel back to catch you if you break the
rules... ;), or you create another universe when you go back in
time...there are theoretical physicists (lots of them) who believe that
another universe is created every single time any possible decision or
multiple outcome is made. Was just reading that the multiple universe
model solves a lot of the problems with string theory for some obscure
reason. Bet it solves all sorts of problems with bank managers and ex
girlfriends and shit too :)


> Under certain situations/events it could be theoretically possible to

> go back in time using theoretical things such as worm holes.

>

> Theoretical Physics is very aptly named.

> Some brain mangling bumpf here if interested - you need to scroll

> down the page: http://en.wikipedia.org/wiki/Time_travel

>

>

>

> On 7 Nov 2007, at 17:24, Schofield, David wrote:

>

>> Nobody has proved that backwards time travel is possible (yet), but

>> relative forwards time travel is possible. Time can be observed

>> going at different rates depending on your relative velocity – the

>> faster you go, the slower time goes relative to someone who is

>> stationary (not that you are ever stationary – stood still you have

>> a velocity of ~30km/s just from the planet orbiting the sun). I

>> think on a transatlantic flight there is a half second or so

>> difference, but the nearer you get to the speed of light the larger

>> the difference.

>>

>>

>>

>> This leads to the ability to travel forward in time. If you could

>> travel fast enough, for long enough, then you could get a

>> significant difference between your time and the time on earth. So,

>> in theory if we threw you off into on a mission to the nearest star

>> at 50% of the speed of light, it would take you ~40 years (of your

>> time) but to us, it would take ~47 years. At 99.99% of the speed of

>> light, it would take you 4 months, but to us it would be 24years.

>>

>> .

>>

>> You can slow light down by passing it through a medium such as

>> glass or water.

>>

>>

>>

>> Time is theoretically linked to other forces also, sufficiently

>> high gravity or magnetic fields could also be used to slow time

>> relatively.

>>

>>

>>

>> You can also get Tachyons, which are faster than light particles,

>> but they are still theoretical. Perhaps CERN will find some.

>>

>>

>>

>> My head now hurts.

>>

>>

>>

>> Dave

>

>

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