Hypothetically if you can travel twice the speed of light?

2008-02-02 9:43 pm
If there's huge huge light emitting clock sitting 1 light year away from earth. Hypothetically, if you could travel 2x faster than light and you're flying towards the clock, would you see the clock going in the reverse direction?

回答 (10)

2008-02-02 10:11 pm
✔ 最佳答案
Purely hypothetically, if you were to see the clock at the moment of your departure, it would indicate the time it was one year ago as seen in your timeframe. As you travel twice the speed of light, you'll reach there in half a year in the future. At that time, the clock will have moved one and half year ahead. That's the incrementation that you must then see, during half a year, hence the clock will happen to run three times as fast as it should.
Of course, that is impossible because traveling faster than light means traveling faster than information. In another example, if you were to see friends on another planet to come to visit you, they would arrive before you could see it. Quite a paradox, isn't it?

[EDITED] I agree with amansscientiae that you won't see anything because ... you can't travel even any near the speed of light but ... that was an hypothetical question, right?
2008-02-02 10:06 pm
You would not see the clock at all. And neither would you see the universe. If you make yourself move faster than the speed of light and apply this transformation CORRECTLY to Maxwell's equations, the light that would be absorbed by you at a speed below the speed of light, will now be emitted by you! So instead of the universe supplying information to you, YOU would be supplying information to the universe. Where does that information comes from...? What does it mean?

I don't know... it probably means nothing. The theory of relativity breaks down for observers which are traveling at the speed of light. From the observer's point of view the universe becomes singular at that point and vice versa. There is no logical reason why a theory which breaks down at v=c should suddenly be valid again at v=c+epsilon.

In other words: you can speculate anything you like. You will simply always be wrong because you don't have a single empirical clue to go by.
2008-02-02 10:03 pm
That's sort of a trick question.

According to Einstein's theories on relativity, an objects mass increases as you near the speed of light, ultimately approaching infinity as you get closer to the mark. I understand that your question is hypothetical, but you already invoke one aspect of the relativity theory - time dilation - so the answer should make use of that.

There are theoretical possibilities of bypassing relativity, which makes the possibility of traveling at greater than light speeds, well, possible, but they all depend upon using methods that avoid relativity entirely. That means that your clock would not suffer the effects of relativity.

Of course that means that there could still be some pretty crazy effects going on. Suppose you bypass the speed of light by using some kind of wormhole effect, or some kind of space warping effect. In those examples, the clock would blur a bit, and simply end up showing the wrong time. The blur being made up of your optical telescope slamming into the photons emitted from the clock that were produced some time ago. In effect your view of the clock would be of it speeding up which would be the opposite effect expected by relativity.

Of course, that is all dependent upon warping or tunneling through space / time. There are other exotic methods imagined in science that could have any number of different effects, many of which I don't think I'm even capable of imagining much less describe.

Hope this helps you!
2016-10-16 10:21 pm
nicely, the main important situation with the hypothesis is which you may choose a *lot* of skill to flow the stick. As products get quickly (close to to the cost of sunshine) their mass will improve, for that reason the quantity of skill required to lead them to will improve, till they become infinite (on the cost of sunshine). as a fashion to holiday on the cost of sunshine, an merchandise might fantastically lots might desire to have 0 mass (like mild).
2008-02-02 11:31 pm
Yes, the question is hypothetical. Suspending real physical constraints and relativistic effects on you, you would see the clock going FORWARD at 3 times normal speed.

When you start, you are seeing the clock as it was a year ago. You get there in half a year. When you arrive, the clock will have advanced 1 and 1/2 years from where it was when you left. That's three times the half-year journey.
2008-02-02 10:22 pm
maybe..I would like to go forward in time myself
2008-02-02 10:14 pm
Doesn't really matter considering if you were goin 2X the speed of light and the clock is 1 light year away it would take 1/2 of a year to get there anyway. But no the clock cannot go in the reverse direction even if you were 5x the speed of light, it would just continue to get slower and slower.
2008-02-02 10:00 pm
No.
2008-02-02 9:49 pm
Not backwards but it would automatically freeze, just like what would happen to everyone and everything
2008-02-02 9:52 pm
Seems as if Einstein thought that way. He came up with a lot of things that can't be proved.


收錄日期: 2021-04-25 13:32:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080202134331AAFD1zq

檢視 Wayback Machine 備份