Is it possible?
2007-10-17 13:28:48 · 7 answers · asked by Noel B 2 in Science & Mathematics ➔ Physics
This question was posted in good faith. Someone out there thought it was stupid but actually took effort to post an answer. Go figure.
2007-10-18 08:17:23 · update #1
Theoretically, according to Einstein's theory of Relativity and normal Physics, time travel is possible. There is a relation between motion and time. In theory, the faster you go, the slower time becomes for you. When you reach the speed of light, time stops. When you travel faster than light, you begin to go back in time.
Consider this story. Sarah and Sam are twins. Sam stays on earth while Sarah goes off in a spaceship with a velocity nearly equal to that of light, orbits a star and returns in what she thinks was one month. When she come back, Sam will be 5 years older than her.
That is the simple theory of traveling to the future. The practicability of this must be questioned. You can never travel as fast as light. With speed, mass increases a lot. By the time one reaches the speed of light, one's mass would have become infinite.
There is something called the Grandfather paradox. Suppose you travel so much faster than light that you land way back to the past, to the childhood of your Grandfather and kill him before he meets his future wife (your grandma). That would make it impossible for one of your parents to have been born and there would be no you in your grandmother's future. then, there would be no one to travel back in time and kill your grandfather later in your grandmother's future. But here you are, having done the deed. So, since later it implies that you never existed, who travelled back in time? A shadow, a ghost? See how confusing it all becomes?
Theoretically, time travel is possible. Practically, far from so.
Just think, if scientists thought time travel was possible in the near future, wouldn't the greatest minds on earth be at work on time travel right now.
Some other theory suggests that time is the fourth dimension after length, breadth and height. It's all chaos.
2007-10-18 19:40:48 · answer #1 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
Well, 'time travel' is not a cut and dry topic. there are many way to perceive it. To travel in time physically or perceptually is the option.
I believe that it may be possible to observe other periods in time other than what we know as 'the present'. It would be akin to watching TV. I believe that we could be able to observe but not interact with what we are seeing.
To physically travel through time may ultimately prove to be impossible but I think there is the possiblility of success. Experiments and theories about the viability of wormhole type phenomenae may prove out.
2007-10-18 12:26:11 · answer #2 · answered by Gee Whizdom™ 5 · 0⤊ 0⤋
Travel into the future is, if you can find a way to go nearly the speed of light. Time will appear to go by on Earth faster than it will for you, and when you come back, everyone will be older than you, depending on how long your trip was.
There's a whole paradox devoted to that, but I won't go into it here.
2007-10-17 20:34:24 · answer #3 · answered by Joshua C 2 · 0⤊ 0⤋
Yes, Theoretically
2007-10-17 21:12:12 · answer #4 · answered by Joymash 6 · 0⤊ 0⤋
Possibly.
I'd wager that there is some means of utilizing quantum physics to transcend time.
It might be possible to send photons thru space and time, but not much more.
Hypothetically,if that was possible, maybe we could take photos of dinosaurs or something.
As for sending people thru time, probably not.
2007-10-17 20:37:31 · answer #5 · answered by dgrhm 5 · 0⤊ 0⤋
next time do a search before you ask a question already asked a thousand times.
http://answers.yahoo.com/question/index;_ylt=AiuabYBAG2evyvjoWHeytekjzKIX;_ylv=3?qid=20071012102817AAoL63v
2007-10-17 21:18:59 · answer #6 · answered by wtjui 3 · 0⤊ 1⤋
I just have to believe it is.
2007-10-17 20:32:06 · answer #7 · answered by Mr. J 3 · 0⤊ 0⤋