can someone explain about this i watched programme some years ago about time travel and if it is possible etc. It was also about man in small aeroplane circling around star or planet very fast and after a while he met himself coming back! so how come? himself in two places eh?
Amethsytfairy:confused:
Hi Amethystfairy
This has to do with e=mc2. The faster you go the slower time goes and in theory that means you could be in two places at once! Only not really, because subjectively, your younger self would remember meeting your older self - subjectively, it wouldn't be the same time, but two different times.
Clear as mud, yet?
Physicists and sci fi writers have had fun with the idea, but have come to the conclusion it probably wouldn't work - or at least with our technology at its present level.
thanks for explaining this coerdelion, am still not getting it! must be thick!
Amethsytfairy:D
Not at all - just physics isn't your thing. The difference between subjective time (ie the time you actually experience from birth to death) and objective time (if there is such a thing) is quite a difficult one to grasp.
But, y'know, read lots of sci-fi and watch it on the telly and you'll soon get the idea 🙂
Fx
I remember reading about this sort of thing in a book about Einstein and his theory of relativity. I definitely agree on it being hard to grasp.
The way I understand it now is that it is relative in that you would feel time differently going super-fast than if you were going slow. You don't literally start moving faster or slower through time.
Another way to understand is the idea of black holes.... they have such a huge gravitational pull that they even drag light into them. So if you watched someone falling into a blackhole, at some point the image you would have of them would be from the past, what could subjectively be called "time travel". But this only a loose definition.
Or think of the stars. Most of them are so far away that what we see in the sky each night is what these stars were doing thousands/millions/billions of years ago.... the light simply takes so long to reach us. So in one sense, we are living in the "past" of these stars and could loosely call it "time travel"...
Another way to understand is the idea of black holes.... they have such a huge gravitational pull that they even drag light into them. So if you watched someone falling into a blackhole, at some point the image you would have of them would be from the past, what could subjectively be called "time travel". But this only a loose definition.
Although you wouldn't have an "image" of them as that would require light being able to reach you as the observer, which it wouldn't.
It's all relative. 😉