can anyone expain the time travel theory that deals with going through space light and the world older then u?

Question

i skipped some words...I read somwhere that if you travel thru space 100 light yrs and back the earth would have aged 200 yrs and you just 1 day if thats all it took you..how is that possible?

Answer 1

The speed of light is not relative (no matter how fast you travel away from light, it always approaches you at the speed of light). This is one of the many reasons why it can not be reached.

The faster something travels, the slower it ages by comparison to those who travel slower. It 'slips' through time. If you were to travel at the speed of light, you would travel very far, very fast.

At the speed of light, time doesn't really pass. A photon that left the sun 100 years ago is still less than one second old. Even though it passed Earth a hundred years ago, it hasn't been alive for one second, relative to it's time.

SO.... So if you traveled at the speed of light, you would travel for a hundred years, but it wouldn't take a tiny fraction of a second for you. Press the lightspeed button; BAM! You're there a hundred years from now. Press it again; BAM! You're back, but your friend's great grandkids are dead by now.

If it was going fast enough, an airplane could take off at noon and land at 3:00pm, but the flight only took 2 hours and 58 minutes for those on board. The airplane has "slipped" through time.

I hoped that helped.

Answer 2

To get a satisfactory answer to this question, you will will most likely have to find someone that understands the special relativity theory. Not to many people can claim this. Further, those who can, speak the language of advanced math. That's tough to understand unless you yourself have had a few advanced math classes.

Let me point out an experiment that was conducted by the government, In which they secured two synchronized atomic clocks. They placed one in a rocket and sent it in to orbit around the earth, at a very high rate of speed. The second clock was left here on earth. When the rocket returned to earth, the time on the clocks were compared one with the other. The clock from the rocket was found to have slowed down. This experiment physically proved that Einstein's Theory of Relativity was indeed true. http://www.btinternet.com/~j.doyle/SR/sr4/sr4.htm

The Theory states that time among other things are relative to the observer: Time can shrink, time can expand depending on your position in space relative to the object in question. So if you left earth, and orbited it at a high rate of speed, you would be younger then you would have been had you not taken the journey. Given enough speed, upon return your Friends would be old and Gray; making it possible to travel to the future. However using speed to get back to your time will prove very difficult if not impposible, you will be stuck in the future. http://www.pbs.org/wgbh/nova/time/through.html

Answer 3

The special theory of relativity predicts that events observed on a spaceship moving with respect to earth will appear to occur more slowly than equivalent events on earth. This is called time dilation effect and becomes significant only at speeds close to the speed of light. Thus if we observe the space ship moving over a long period we will grow older but the occupants (and all other physical processes) on the spaceship will proceed at a slower pace from our point of view. When the ship returns to earth, the occupants will be younger than we would expect them to be had they remained on earth.

As the first answer explains, this time dilation effect has been observed and measured, it is not just hypothesis.

This effect gave rise to the "twin paradox" in which if your twin went on the space ship he would return younger than you. However, from the point of view of the space traveler, he would see earth moving away from him, and relativity states that his point of view is just as valid. Since he sees you moving he can state that you will be younger than him when he returns. Obviously, they both can't be right so this paradox was used to try to discredit the special theory. The paradox is resolved by the general theory which takes into account that only one of the twins has to undergo acceleration to achieve the hight speed, and that is the one for which time slows down.