Time Travel: Einstein’s Big Idea (theory Of Relativity)
Saturday, February 27th, 2010 at
10:57 pm
To watch the whole documentary in High Quality go to:
http://www.youtube.com/watc…
Here is a little clip about how time travel can occur. The clip was taken from: The World’s First Time Machine…
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time travel would never be available to the average person. it is too dangerous. even if the president of the us used a time machine to travel 10 years into the future to see america then it would be like he left for 10 years. so it would be impossible to use a timemachine to fortell your future by yourself. and you cant do anything to change that test score last week because then it would create a paradox. you get the good test score and dont decide to go back in time
Ah, 2 minutes in traveler’s frame? Well then, you still couldn’t see yourself back in the past.Yes – the trip could take only 2 minutes due to time dilatation, but length contraction would mean the distance your image has to cover shrinks also – to exactly 2 light minutes.So by the time you make the trip your past image has already passed your destination, and that telescope would be of no help. You can never outrun your image…
Faster than light travel is impossible, but faster than “c” travel is very possible. The proper speed of light is infinity, because in its own frame, it goes any distance in zero time. The Universe, from the viewpoint of light, seems to have zero size due to its infinite speed.
FTL travel is impossible. Close to light speed travel is possible. Which you would be travelling at the exact same speed as the light that left earth the same time you did. meaning time would stop completely for you. Lets say u travel 10 light years. 10 years would have past on earth as the light took 10 earth years to travel what took you 2 minutes as time for you had stopped. Meaning by the time you get back to earth 20 years would have past and for you it would have been 2 minutes.
And let’s say you (current self) shoot a super-powerful laser beam at that moving picture of your past self.You’d kill yourself before reaching a place from which you shot a laser killing yourself – a paradox.I guess we can forget FTL travel
@mosquitobight Ok, I concede that light, itself, doesn’t experience time. Yes, according to Einstein, if we could go the speed of light, then we’d experience time to be zero too, plus we’d have zero length.
@mosquitobight Oops, I’m sorry, yes it’s per second, not per hour.  Typing error. Not used to typing MPS KPS.
@UnderManiacBy the way; your figures for the speed of light should have units PER SECOND, not per hour.
@UnderManiacNo I’m not wrong.For us the observers, light takes 8 minutes from the sun or say 13 billion years from a galaxy. But for the light, all trips are instantaneous because all distances are zero. From our POV light takes time to get here, but the light itself experiences no time, and neither would we if we could travel with it.
And to add to this, lets say you waited at that spot for 10 years. You would essentially see past self begin to travel towards your current self.