time travel

[shrimpy]

Re: time travel

bull****
it doesnt exist you need to get a life and worry about global warming
theshrimp

[T0rajir0u]

Re: time travel

Here's a better analogy:

Pretend the world is a two-dimensional circle. (I realize it's not, but for the sake of analogy and visualization.) You can visualize history as an infinite cylinder, with the third dimension being time.

So at any point, you're at a circle on this cylinder, moving around in the world. You can trace something through time by tracing its movements upwards through the cylinder.

But the most important part of this analogy is that the cylinder doesn't change. It's a cylinder, it's there, and that's all there is to it.

Now, moving backwards through time would simply involve moving backwards through the cylinder. But this is an event that is already on the cylinder.

So, either:

1) Time travel is impossible because it's not recorded anywhere on the cylinder, or
2) Time travel won't change anything. Because it already happened.

[i_like_ham]

Re: time travel

even so if you could go the speed of light and and we could use time dilation to our advantage we would have to be able to harness it. Noit only that but then there would have to be a pretdetermined future becuz how can you go into the future if it hasn't happened yet. If anything is evenly remotely "possible" it would be going back in time but even that can't be achieved.

[Kit-]

Re: time travel

Also people are ignoring the fact that if it was not possible to travel through time nothing would happen. So the real question is can we modify the speed of our travel through time. http://www.rebelscience.org/Crackpot...us.htm#Nothing is a relevant article talking about travel through time. But one of the most clear and understandable points to me was how would you measure time travel? Would it be something like 1s per 5s? Then you would simplify to a speed of just 1/5, with no units, which just is not acceptable.

Radians are meters/meter. Did I just break the universe?

[djreality14]

Re: time travel

Has anyone read the Michael Crichton book, "Timeline"? I think that's a good way of defining time travel.

[flamingspinach]

Re: time travel

Radians are meters/meter. Did I just break the universe?

No lol, learn your physics properly - radians are meter-radians per meter.

Also I like how people keep bumping this topic with posts that totally disregard everything that has been established over the last 96 posts >_>

-fs

[Suzuru]

Re: time travel

No lol, learn your physics properly - radians are meter-radians per meter.

Also I like how people keep bumping this topic with posts that totally disregard everything that has been established over the last 96 posts >_>

-fs

Many people would sooner die than think. In fact, they do. - Bertrand Russell

Let us be thankful for fools; but for them the rest of us could not succeed. - Mark Twain

Handy quotes

[T0rajir0u]

Re: time travel

there would have to be a pretdetermined future

Good job. Read my post.

@others: Radians have no units, and why would you want to measure time travel?

[i_like_ham]

Re: time travel

it is possible to see past events and future events though. this would require going several times the speed of light though and you would not be in a different time era but you would be able to view something from long ago. If you where to leave earth right now and go several hundred light years away in one light year, you would see the earth from 99 light years ago. this is only becuz you have surpassed the distance that the light earth has reflected. So you would see earth at a different time. also you can do this by going to a distant star. from earth you are seeing the star from however long it took for that light to reach earth. if you could travel faster to that star than it took for the light to reach earth then you would then skip several stages of it's life.

[flamingspinach]

Re: time travel

t0rajir0u, sure radians have units - they're a transformation between two distance domains.

[T0rajir0u]

Re: time travel

it is possible to see past events

Everything you see is past events. Light takes time to reach you, so by the time it has, whatever caused the light to reach you has already moved somewhere else.

t0rajir0u, sure radians have units - they're a transformation between two distance domains.

If you want to think about it that way =/ As a mathematician, it makes more sense for me to define radians without units, since functions like sine are best defined as functions on dimensionless quantities (so they can be written as nice power series without any qualms, and since sine itself is dimensionless).

[perkeyone]

Re: time travel

oo this is soo cool i am really going to enjoy talking in this thread lol im a nerd..
ok here are my thoughts about time....
1 i truely do not see why light has anything to do with time. light only makes an object apear to be a certain way shouldnt time stay constant at any speed? if my watch says it is noon and a snycronized clock is traveling at a significant fraction of the speed of light away from me it would seem to slow down but wouldnt the actuall time be the same as my watch?
2 time dialation doesnt make any sense either. how can time pass at different rates for two different people? if i go into space and come back and all my friends are 100 years older shouldnt i be the same? i understand time may seem to take longer but it does that when ever your bored.
3 time if like the other dimensions should be traversable but if so travel into the past would lead to paradox unless there are alternate timelines and travel into the future would mean that the future is predetermined unless
4 dimensions like length width and hight are fairly simple and easily "manipulated' but what make time so "special" and before the big bang (assuming there was a big bang) the singularity of infinite density had no dimensions no length with or height and no time had gone by so no dimensions even existed untill "time" as time passed the singularity begand expanding thus creating the 3 other dimensions... assuming ass more time passes by or as of any other dimension does will more dimensions arise?
----im going to go ahead and post this so i can think about other questions ive been pondering

[scottish]

Re: time travel

Yeah, You look at the sun and its 8 minutes behind what you are actually seeing.
On my personal note, I do not believe in time itself. Time is a man-made invention to create a system for humans to rely on, a simple organization tool. Take time away, as in no day month year minutes second..blah blah, and you a simple staight path. Time Travel is technically referring to, numbers.
On another personal note, I do believe on co-existing planes.

[flamingspinach]

Re: time travel

stuff lol

go become sentient

On my personal note, I do not believe in time itself. Time is a man-made invention to create a system for humans to rely on, a simple organization tool. Take time away, as in no day month year minutes second..blah blah, and you a simple staight path. Time Travel is technically referring to, numbers.
On another personal note, I do believe on co-existing planes.

The concept of time, stripped down to only that which is necessary in our physical theory, and ignoring human experience, is defined as the independent variable along which matter/energy varies. Effects propagate along time. Besides that, there are various other indicators of "time" - see http://en.wikipedia.org/wiki/Arrow_of_time

-fs

[stfuitsbrandon]

Re: time travel

Everything you see is past events. Light takes time to reach you, so by the time it has, whatever caused the light to reach you has already moved somewhere else.

i dont agree with that, i could see what you mean, but a person standing in front of you is not a past event, you could use other senses then light to detect them at that moment.