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Old 07-02-2008, 07:08 PM #81
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Default Re: Time Travel, is it possible?

Quote:
Originally Posted by Diachi
your not chuck, thats an offense payable by death, impersonating CHUCK !!

yeah everything would be super cheap without tax and inflation.

I also have considered friction , there is none in space, and material/chemical properties, a big fat radiation/heat shield will protect the ship from the explosion, and also act like a sail by absorbing energy from the explosion pushing the craft forwards.

While I was making the last post I remembered that a solar sail would also work.

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I imagined the machine being on earth.




and i dont impersonate Chuck, i am NOT the Chuck. only CHUCK is THE CHUCK.

i just spread his voice around [s]the world[/s] LPF


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Old 07-02-2008, 08:34 PM #82
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Default Re: Time Travel, is it possible?

;D so you follow CHUCKISM ?
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Old 07-02-2008, 11:46 PM #83
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Default Re: Time Travel, is it possible?

Quote:
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;D so you follow CHUCKISM ?
I STARTED it.



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Old 07-03-2008, 10:07 AM #84
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Default Re: Time Travel, is it possible?

thanks 8-)

Its a short clip from a laser show I had on my PC, and thought it might be cool to make a GIF from it I'm gonna watch through more of the video later and see if I can find a cooler section.

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Old 09-20-2008, 07:26 AM #85
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Default Re: Time Travel, is it possible?

Quote:
Originally Posted by laserlover
watch these videos and tell me time travel is impossible!!! and guess what, lasers are involved!!!

[media]http://youtube.com/watch?v=X02WMNoHSm8[/media]

[media]http://youtube.com/watch?v=oRWwI61so5Q&amp;feature=related[/media]

I have seen both of those vids and I am reasonably certain that time travel could be done with MODERN technology. There is a catch though. :P Like in the video it would only be to send information through time. Because information has no limit for how much info you can have in a mass (basically I am saying that mass has no limit to how much information you can have in it so). Information=no mass?

As you are going 99.99% the speed of light time slows WAY down for you. You can jump forward into the future but only information can travel back in time (at least thats what I think). So right now humanity has access to the Large Hadron Collider. This Collider will slow down a particals life to a crawl so they can actually get a good look at it before its &quot;life&quot;
ends. So the partical is actually traveling into the future. Now this is where things start to get interesting. What if you could send a partical that was entangled with one that stays in the past? Quantum Entanglement allows information to travel at an infinite speed without braking the laws of physics (an entangled partical will react EXACTLY when the other one
does something so you could (at least theoretically) information from ANYWHERE maybe even to the past.

There is just one problem with my theory. :P I am not so sure that you can send information with Quantum Entanglement. :-/


Damn, my brain just did a lot of computing. :-X
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Old 09-20-2008, 09:54 AM #86
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Default Re: Time Travel, is it possible?

The problem with Mallett's theory (the one in the videos) is that it depends on the existence of a 'line source', a 2-dimensional singularity, basically a linear black hole. This places his theory roughly in the realm of fairy dust and flying monkeys, unless John Titor shows up again.

Hydro, check out the [link=http://www.npl.washington.edu/ti/]Transactional Interpretation of Quantum Mechanics[/link]... based on the stuff you've written I think you may have already read it, but if not you might enjoy it.

If you jiggle a particle, it pushes back. It does this as though it 'knows' exactly where it is in terms of the rest of the particles in the universe. But (according to Einstein) nothing can move faster than light, so if you think of whatever force is making the particle push back as being mediated by some (as yet undetectable) particle or wave, you'd expect to see the particle you pushed jiggle back not all at once, but at different times based on how long it took the perturbation to travel to other particles and bounce back at the speed of light. This clearly doesn't happen, and in various ways the different interpretations of quantum mechanics have tried to explain this away.

Cramer's theory holds that when you jiggle a particle, the perturbations travel both forwards and backwards in time (something Maxwell's equations DO permit). In the forward direction, the perturbation spreads out until it hits something that it reacts with, and the reaction bounces back in time. Since it travels the same distance in both directions, the backwards response arrives at exactly the right time to counteract your jiggling, and this also means that different particles at different distances will all contribute their responses at that exact time. The same process is happening in the other direction as well, with your particle sending a perturbation back in time where it causes forward responses, which also arrive just in time to counteract your jiggling.

Of course, this plays hell on the concept of 'free will' since it means that some portion of the universe's response to your jiggling has been traveling towards you from the far stars since long before you even existed.

The most interesting thing about Cramer's theory is that it doesn't change anything in quantum physics, it just explains it in a way that does away with some of the harder-to-digest parts of other interpretations (the whole 'observer collapsing a waveform' idea... what, a cat isn't qualified to observe whether it is alive or dead?). The forward and backward waves cancel each other out in areas of space-time that lie outside the classical path, and reinforce each other within that path.

If he's right, it means that we're living in a soup of interactions traveling backwards and forwards in time, but they cancel out so we only see the forward bits. Using this phenomenon for sending actual information back in time currently involves leaps of imagination similar to Mallett's line source, though... basically the idea is that in the future you create some absurdly powerful object that deforms space-time (more designer black holes?) and jiggle it, then detect the changes those jiggles made on particles in the past. You could do a sort of Morse code by moving the fanciful source in and out of line-of-sight of the target, or coming up with some way to block its effects selectively.

And, since I'm on a ramble, an idea for people who reject the very concept of backwards time travel:

When you put on glasses with red lenses, you see everything in red. If they were blue, you'd see everything in blue. With or without those glasses, the process of 'seeing' implies that photons have interacted with your eyes (interesting side-effect: this means that if you were invisible, you wouldn't be able to see anything), triggering an electrical cascade that gets sent down your optic nerve to your brain. That whole process is entropic: complex molecules break down into less complex molecules, stored energy is released, the amount of energy in your body goes down... and all of that happens in a framework where you eat to preserve yourself, but that takes away energy from plants and animals, which in turn take away energy from the earth, which takes away energy from the sun, etcetera etcetera... the whole thing is winding down, every step in the whole process is governed by entropy.

Perhaps we see everything though entropy-colored lenses.

Since entropy is a one-way process, our entropic seeing process might only allow us to see other entropic processes, the way polarized lenses only let you see light that is similarly polarized. There could be all kinds of things going on around us that we simply aren't able to perceive since all of our tools for seeing are entropic.

Just an idea.
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Old 09-20-2008, 10:33 AM #87
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Default Re: Time Travel, is it possible?

Time travel Yes its possible if I wanted to go ahead say a couple of days I'll just Tell my wife Hey Babe can I spend a couple hundred bucks on a new laser and BAAAMMM i'll wake in the future two days from now with a knot on my head
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Old 09-20-2008, 11:59 AM #88
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Default Re: Time Travel, is it possible?

Quote:
Originally Posted by john_lawson
Time travel Yes its possible if I wanted to go ahead say a couple of days I'll just Tell my wife Hey Babe can I spend a couple hundred bucks on a new laser and BAAAMMM i'll wake in the future two days from now with a knot on my head
;D ;D ;D------- LOL--------- That cracks me up LOL---- ROFL ;D ;D ;D ;D ;D
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Old 09-20-2008, 03:20 PM #89
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Default Re: Time Travel, is it possible?

Einstein theorized that it is possible to go forward it time and he described how. He said it was impossible to go backwards in time. he hated to talk about it as it gave him headaches thinking of the paradoxes.
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Old 09-20-2008, 04:00 PM #90
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Default Re: Time Travel, is it possible?

Time doesn't exist. It's not a thing. It's just an idea.

There's my $0.02. Or is it?
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Old 04-17-2009, 02:42 AM #91
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Default Re: Time Travel, is it possible?

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Old 04-17-2009, 02:10 PM #92
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Default Re: Time Travel, is it possible?

I'm no math expert so I'll leave the fun of discussing detailed theories to others. My only purpose in going back in time would be to do what Biff did in back to the future part 2. I'd make myself a billionaire, I'd have a giant block of printouts on winning sports teams, and stocks, and then explain to my past self how to use them to get rich. The lottery once but that's a billion. I'd need the billion for a megawatt laser pointer (make that a few trillion).

Also don't kill Hitler, Stalin will just end up attacking western Europe and starting WW2 anyway. *;D *

The idea of finding of a good job is far-fetched for me right now and you guys are discussing time travel! *

Carry on though and watch futurama to see the results of time travel (I'm my own grandfather)... :-X
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Old 04-18-2009, 11:53 PM #93
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Default Re: Time Travel, is it possible?

Without reading all of the above...

Quote:
Time Travel, is it possible?
Not yet, or not anymore.

Or in this context, does it even matter which one?
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Old 04-19-2009, 10:42 PM #94
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Default Re: Time Travel, is it possible?

Ok im not too sure about time &quot;travel&quot;, but we can observe back into time, which is what we do when we look at anything because the speed of light is finite, so im thinking if we do want to see the dinosaurs we then we have to have some types of aliens or something that are 65 million light years away from earth and are observing earth and they would be receiving the light information that happened 65 million yrs ago. but then we would take a heck of a lot more &quot;time&quot; to go and get the damn thing to see what actually happened. or we need to find a huge &quot;mirror&quot; in space that can reflect the light that earth emitted into space and thus look at that with the telescope and also see what happened... But enough of that... earlier in this topic i read something about the universe expanding and contracting, (first of all, does light go out of the boundaries of the expanding universe or does it bounce back in. if it did bounce back then there might be a way of looking way back into time.)... but as for the universe goes, then if it just keeps on expanding then since there is just enough matter in the universe and the matter is not generating more matter, then what happens when its all spread out as far as it can be, if the universe still expands more then we would reach a vacuum, but according to the laws of thermo, shouldn't the particles want to fill up that vacuum to keep the pressure in equilibrium, and if there is (which of course there is) gravitational pull as now, since our universe is dynamic, we would have some parts of the universe more pressurized than others but still there is no vacuum... I was taught in my astro class that there are patches in the universe that are in average on something like .01 particles per cm^3, yet the temperatures in these &quot;patches&quot; of the universe are something like 3000K. therefore the particles in these patches are moving really really fast! so if the universe keeps on expanding, then all these particles will have to start speeding up because they will want to be filling up these vacuums that the expanding universe is creating. but they can only go so fast because they cant reach the speed of light... so what happens after that?????!!!!???

This is all in my head and its really hard to explain so i dont know if you guys understand what im saying.....
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Old 04-19-2009, 11:34 PM #95
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Default Re: Time Travel, is it possible?

I didn't read all of the post but i read someone them. I believe that according to modern physics that time travel is impossible. That being said i also think that modern physics is dead wrong. We have different models for macro, micro, and the world we live in, don't you think that the same rules would govern all of these, and not individual rules for the different scales. Also not sure were i heard this but i am pretty sure i'm remembering it right. According to modern physics isn't it possible to go faster than the speed of light, just not as fast?

To anyone that would likes to read about this kind of stuff i would recommend the book &quot;Physics of the impossible&quot; by Michio Kaku. It is a great book, although i am not finished with it yet.
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Old 04-20-2009, 05:42 PM #96
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Join Date: Feb 2008
Location: Yellowknife, NT, Canada
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Default Re: Time Travel, is it possible?

All you need to do is bend some dimensions through other dimensions, and that's you got time travel! easy as that . You just need to get 50 stars similar to out sun and collide them at nearly the speed of light, that should do the trick :

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