2007-11-29 09:03:23 · 5 answers · asked by Anonymous in Education & Reference ➔ Trivia
sorry I did mean faster than the speed of light.
but traveling from the sun faster than light would time on earth go back?
2007-11-29 11:04:56 · update #1
no. time travel is impossible, no matter how many stupid hollywood movies pretend it exists. people who read science fiction believe in time travel. people who read science, do not
besides, the speed of light is just that, the speed of light. it has nothing to do with time, or time reversal.you act as if you are sitting still right now at your computer. well you are not. you are spinning a 1000 miles an hour on the earth, you are traveling 2 million miles a day around the sun. you are traveling 8 million miles a day around the center of the galaxy your galaxy is traveling 14 million miles a day through the universe. that totals up to you traveling about a million miles an hour right now. has time slowed down for you?
2007-11-30 04:26:49 · answer #1 · answered by Anonymous · 1⤊ 0⤋
I see where you're going with this, but I think you would need to travel faster than light over long distances to arrive before an event occurs.
Say you are at the sun, and it changes color to blue all of a sudden. It takes about 8 minutes for the light of the sun to reach Earth, but if you travels faster than the speed of light, you will arrive at Earth "before" the sun changes color.
To travel into the future one would only need to approach the speed of light.
If you were to travel away from Earth at 99% of the speed of light for 6 month, then 6 months at the same speed back towards Earth for you only 1 year has gone by. For those on Earth about 70 years have gone by. As you approach the speed of light time slows down (among other things).
2007-11-29 18:47:06 · answer #2 · answered by Avram88 2 · 0⤊ 0⤋
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.
2007-11-30 12:25:13 · answer #3 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
No. You would age more slowly than people who were not travelling at the speed of light, but you wouldn't go back in time.
2007-11-29 17:14:32 · answer #4 · answered by John F 6 · 0⤊ 0⤋
I believe you are all confusing the speed of light w/the term light year.
No matter your speed, if travel any direction 6 mos. turn around and return in 6 mos., you've been gone 1 yr. here and there.
2007-11-30 01:22:43 · answer #5 · answered by H.E. G 4 · 0⤊ 1⤋