No, you are talking fairy tales, and pink Unicorns, and really chicken little stuff.
It is most certainly hogwash you are talking and will remain so at least until you recognise the fact that time travel is not forbidden.
Time Travel is Science Fiction
- Thread starter Farsight
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No, you are talking fairy tales, and pink Unicorns, and really chicken little stuff.
It is most certainly hogwash you are talking and will remain so at least until you recognise the fact that time travel is not forbidden.
Yes, please, let's hear your physics.
1) show us how to do physics using just accumulated motion.
2) show us how the mechanical properties of a crystal are dictated by electromagnetic bonds (I assume that you will also do this with accumulated motion.
Unless, of course, you were lying about doing physics.
I must have said the following before at least in general terms, but let me give a specific example:
You can not go back in time to the city of Ferguson the day before Mike Brown died. - It does not exist anywhere to go back to - the past is gone - non-existent.
I'm not arguing that point...another cop out.
I said The laws of physics and GR do not prevent time travel:
And followed that up with "and any sufficiently advanced civilisation could achieve it:
http://plus.maths.org/content/time-travel-allowed
and.....
http://www.pbs.org/wgbh/nova/physics/Sagan-Time-Travel.html
where in part he says.....
It might be that you can build a time machine to go into the future, but not into the past."
On past time travel he says.....
Such questions are purely a matter of evidence, and if the evidence is inconsistent or insufficient, then we withhold judgment until there is better evidence. Right now we're in one of those classic, wonderfully evocative moments in science when we don't know, when there are those on both sides of the debate, and when what is at stake is very mystifying and very profound.
If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.
"Maybe backward time travel is possible, but only up to the moment that time travel is invented."
He also says....
Time travel into the indefinite future is consistent with the laws of nature."
In the Kip Thorne link at.....
http://plus.maths.org/content/time-travel-allowed
Travelling backward in time: chronology protection
We physicists have been working hard since the late 1980s to understand whether the laws of physics allow backward time travel. We do not have a definitive answer yet, but the likely answer has been summarised by Stephen Hawking, in his Chronology Protection Conjecture (see [1]): The laws of physics always conspire to prevent anything from travelling backward in time, thereby keeping the Universe safe for historians.
We physicists have identified two mechanisms that might protect chronology: (1) The exotic material that is required in the manufacture of any time machine might be forbidden to exist, by the laws of physics — forbidden to exist in the large amounts that time machines always require. (2) Time machines might always self-destruct, explosively, when one tries to activate them.
http://plus.maths.org/content/time-travel-allowed
Travelling backward in time: chronology protection
We physicists have been working hard since the late 1980s to understand whether the laws of physics allow backward time travel. We do not have a definitive answer yet, but the likely answer has been summarised by Stephen Hawking, in his Chronology Protection Conjecture (see [1]): The laws of physics always conspire to prevent anything from travelling backward in time, thereby keeping the Universe safe for historians.
We physicists have identified two mechanisms that might protect chronology: (1) The exotic material that is required in the manufacture of any time machine might be forbidden to exist, by the laws of physics — forbidden to exist in the large amounts that time machines always require. (2) Time machines might always self-destruct, explosively, when one tries to activate them.
Time travel is a fantasy.., science fiction.., that even noted scientists get caught up in from time to time.
Attempting to make it something real by essentially declaring the differential aging of twins in the twin paradox or any GR variation, is grasping at straws. Living from today until tomorrow is not time travel, in any sensible interpretation of the phrase.
While some of the math may suggest time could move both toward the future or the past, in other words there is no mathematical law that forbids a change of signs.., reality is defined by the math only to the extent that the math accurately describes reality. There is nothing in reality that supports the idea that time travel is possible.., unless you are using H. G. Wells, or movies like Star Trek, as a scientific source.
Attempting to make it something real by essentially declaring the differential aging of twins in the twin paradox or any GR variation, is grasping at straws. Living from today until tomorrow is not time travel, in any sensible interpretation of the phrase.
While some of the math may suggest time could move both toward the future or the past, in other words there is no mathematical law that forbids a change of signs.., reality is defined by the math only to the extent that the math accurately describes reality. There is nothing in reality that supports the idea that time travel is possible.., unless you are using H. G. Wells, or movies like Star Trek, as a scientific source.
Good stuff.
Excellent. I think there are people who know full well that time dilation is not time travel, but try to pull the wool over the eyes of mugs and suckers by saying it is. Because it helps them peddle their woo and pimp their book.
Music to my ears.
Agreed. The past is something of a label for "where everything used to be". But everything isn't where it used to be. Everything has moved. And there is no way that you can move that gets everything back where it used to be without ever having moved at all.
OK, now we are getting to opnions as to what can be and what can not be achieved, and away from the fact that "The laws of physics and GR do not forbid time travel"
The twin paradox [which really isn't a paradox] is a legitimate analogy, and could be achieved by any sufficiently advanced civilisation in a variety of ways.
The technology to control and shape spacetime....The Alcubierre drive for example....wormholes are another. Yes we have yet to find any, but like time travel, they are not forbidden, and if we had the technology to manipulate spacetime, we could possibly construct our own. SMBH's are another way, particularly a Kerr metric type BH, and the region we call the Ergosphere.
No one is attempting to make anything real. The fact though remains that while nature does not forbid something, then that something is always on the "possibility" listings.
With time travel, we are at this stage aware that at the micro level [muons and such] it is indeed factual that it happens and happens all the time.
This ladies and Gentleman, coming from an idividual that has claimed he has a TOE and will rewrite all of 20th/21st century Cosmology, and expects we all at sciforums should believe him!
http://www.umich.edu/~engtt415/science/
"When we are confronted by black holes, Einstein-Rosen bridges, and time dilation, we are being asked to deal with phenomena that are totally out of accord with the universe we understand -- or think we understand. We cannot visualize them - only accept them. Until someone improves upon or replaces Einstein's General theory of Relativity - and at present this seems highly improbable - there is no alternative. If rotating singularities exist, and there is increasing reason to accept that they do, then the possibility of time travel, including travel into the past, has to be accepted, however fantastic it may seem."
"When we are confronted by black holes, Einstein-Rosen bridges, and time dilation, we are being asked to deal with phenomena that are totally out of accord with the universe we understand -- or think we understand. We cannot visualize them - only accept them. Until someone improves upon or replaces Einstein's General theory of Relativity - and at present this seems highly improbable - there is no alternative. If rotating singularities exist, and there is increasing reason to accept that they do, then the possibility of time travel, including travel into the past, has to be accepted, however fantastic it may seem."
As difficult as it is, even NASA is doing research into time travel and FTL warp travel.
Here's another......
Professor predicts human time travel this century:
With a brilliant idea and equations based on Einstein’s relativity theories, Ronald Mallett from the University of Connecticut has devised an experiment to observe a time traveling neutron in a circulating light beam. While his team still needs funding for the project, Mallett calculates that the possibility of time travel using this method could be verified within a decade.
Read more at: http://phys.org/news63371210.html#jCp
Here's another......
Professor predicts human time travel this century:
With a brilliant idea and equations based on Einstein’s relativity theories, Ronald Mallett from the University of Connecticut has devised an experiment to observe a time traveling neutron in a circulating light beam. While his team still needs funding for the project, Mallett calculates that the possibility of time travel using this method could be verified within a decade.
Read more at: http://phys.org/news63371210.html#jCp
"Theory of everyone else is wrong". How come I never thought of that. Classic.
Merry Holidays. Whatever they are.
BTW take a good shot. I deserve it after my comments in the climate science thread.
Please tell more, if you are asserting that muons do travel back into the past. I don't believe that as the past no longer exists.
Cosmic rays produce an abundance of muons traveling near speed of light that reach the surface only because the clocks in their frame are running very slow wrt clocks on Earth - by our clocks almost none should as in the time for light to make that trip down as they would all most all have decayed - direct proof of "time dilation" as by our clocks half should have decayed while traveling only a few meters as their life-time in their own frame is very short.
Man can make a lot of muons too:
http://en.wikipedia.org/wiki/ISIS_neutron_source said:
Please use either (your choice) cosmic ray daughter muons or those produced by ISIS (not the terror group) to illustrate that they do travel back into the past - I don't think you can, but extend this opportunity for you to show your statement is not just ignorant BS, gleaned for science fiction stories.
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Well, that would make time travel unreal, would it not?But what if time itself isn't real
My head, it hath doth exploded!
Paddoboy: you believe in woo pimped by quacks who want you to buy their book. Time dilation is not time travel. Muons don't time travel. They just last longer when they're moving fast because of the wave nature of matter. It's like a muon is a wave in a closed path that lasts for a zillion cycles. Think of the path as a circle like this O then turn it sideways like this | then move it fast so it looks like this: /\/\/\/\. It's like stretching out a helical spring, and it's like the simple inference of time dilation. The zillion cycles takes longer, that's all. It's all simple and mundane and sensible. And if you doubt me, go and look at muon decay. A muon decays into an electron and neutrinos which depart at the speed of light. Then you can annihilate the electron with a positron, the result being gamma photons which depart at the speed of light.
I was laughing so hard after reading that I almost choked, for real! I mean Farsight really! What do you think almost everyone thinks of what you have been posting? .... And I did not even read the rest of the post!
Some of the guys here and elsewhere think I've been posting good stuff. And the number is increasing. Remember it's me who refers to Einstein and the evidence. So come on, where have I posted woo? Did I post woo about time travel? No. Did I post woo about the speed of light? No, because I quote Einstein and Don Koks and Ned Wright and Irwin Shapiro and more. Did I post woo about electromagnetism, when I'm referring to NASA and Maxwell and Minkowski and Heaviside? No. You can't point out where I'm posting woo, because I'm not.