Shows about time travel

Discussion in 'Physics & Math' started by arfa brane, Apr 9, 2018.

  1. goose Registered Senior Member

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    right but in the shows/movies it always shows that the individual didn't go back in time (as in, get younger)... the universe did (younger universe).
     
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  3. DaveC426913 Valued Senior Member

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    Wouldn't it be a simple matter of concentrate their observations on the right place and looking really hard until they found it?
     
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  5. DaveC426913 Valued Senior Member

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    If I turn my car around and head back home, does my gas tank return to its former (younger) Fullness?
    No. Turning around and going the other way doesn't reverse you; you don't get younger when you travel back in time.
     
    Last edited: Apr 14, 2018
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  7. goose Registered Senior Member

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    No because your arn't going in a true negative direction (not talking about positive and negative in terms of an X, Y, and Z axis).
    Going back in time is a true negative, much like a negative velocity is a true negative. (For the record, I do not believe in time travel at all to be even remotely possible due to its negative nature).
    Sure you are now going along a new vector, but you are still moving in a positive motion. That is entirely different from the phenomenon described in movies.

    your example would indicate going back in time is no different than turning around or walking backwards down the road. Extremely different phenomena.
     
  8. DaveC426913 Valued Senior Member

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    That is, indeed, what people generally mean when they talk about "travelling through time".
     
  9. Michael 345 Looking for Bali in Nov Valued Senior Member

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    Let me think bout that. I know it not a trick question but at the moment I have a few distractions going on

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  10. TheFrogger Registered Senior Member

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    As someone posted, if you yourself reversed time the universe around you would also reverse. Where would the Earth and Sun be?
     
  11. DaveC426913 Valued Senior Member

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    Let's be clear: if you were to travel backward in time, you could observe the universe moving in reverse. The universe itself would not.

    What would happen to the Earth and Sun is self-evident; you would watch them reverse their directions of rotation/revolution, and trace their path backwards.

    (Interestingly, you would not notice anything strange about the physics. Most physical processes are direction independent. The Earth revolving around the Sun in the opposite direction would obey all physical laws you could test, as would most of the rest of nature (with the exception of thermodynamics, and certain subatomic properties)).
     
  12. C C Consular Corps - "the backbone of diplomacy" Valued Senior Member

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    The surrounding environment as represented or manifested in your perceptions, anyway (though whether you could still cognitively recognize it as "reversed" is perhaps another matter). In contrast, the experience-independent version of the cosmos which rationalist activity has historically inferred / posited would remain as static as ever in the supposed physics rendition of it.[*]

    Robert Geroch: "There is no dynamics within space-time itself: nothing ever moves therein; nothing happens; nothing changes. [...] In particular, one does not think of particles as 'moving through' space-time, or as 'following along' their world-lines. Rather, particles are just 'in' space-time, once and for all, and the world-line represents, all at once the complete life history of the particle." --General Relativity from A to B

    Paul Davies: "Peter Lynds's reasonable and widely accepted assertion that the flow of time is an illusion (25 October, p 33) does not imply that time itself is an illusion. It is perfectly meaningful to state that two events may be separated by a certain duration, while denying that time mysteriously flows from one event to the other. Crick compares our perception of time to that of space. Quite right. Space does not flow either, but it's still 'there'." --New Scientist, 6 December 2003, Sec. Letters

    Hermann Weyl: "The objective world simply IS, it does not HAPPEN. Only to the gaze of my consciousness, crawling upward along the life line [worldline] of my body, does a certain section of this world come to life as a fleeting image in space which continuously changes in time." --Philosophy of Mathematics and Natural Science

    - - - footnote - - -

    [*] The latter models or constructs don't have to be metaphysically reified, though, anymore than the rival ontological claims of commonsense realists. Aside from competition between the two parties provoking such, it's a rather useless step since both "yay" and "nay" opinions about _X_ metempirical assertions can't be validated.

    ~
     
  13. RainbowSingularity Valued Senior Member

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    binary ...
    mathamatically your making something exist in the past that was previousely not there.
    this is a little different to alternate realities(for example).

    Can science define the ability to create something that was previousely not there in any known form ?
    or... is the transmission simply a "re-organisation" of existing energy into some form ?
     
  14. Gawdzilla Sama Valued Senior Member

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    What-if you put the WTC back in place on 9/12/01. What happens to the rubble from 9/11?
     
  15. Michael 345 Looking for Bali in Nov Valued Senior Member

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    What rubble are you talking about?
    World Trade Centre rubble????
    The buildings are there you idiot
    Anybody like to help this person to medical assistance?

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  16. Gawdzilla Sama Valued Senior Member

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    Remember that I put it back the day after they fell.
     
  17. Michael 345 Looking for Bali in Nov Valued Senior Member

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    And that conversation took place the day after that

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  18. Gawdzilla Sama Valued Senior Member

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    Yeah, but the debris is spread out, not just on the ground but people have taken souvenirs home. Time somehow has to track all that crap down and delete it.
     
  19. Michael 345 Looking for Bali in Nov Valued Senior Member

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    Bully for time

    You may or may not know my position on TIME - it does not exist

    Apart from that

    Scenario
    If if if someone makes a time machine and zips back 100 years and spends a week there
    Now the problem becomes the world the traveler left has continued (without the traveler) and aged another week
    So does the traveler go back to the moment they left or to the new 1 week older world?

    Not going to happen

    Nearly forgot

    The idea that Relativity does not exclude time travel

    Incorrect

    What it does not exclude is PROCESSES reversal
    ie you can unscramble a omelette and make a egg (however difficult and unpractical)
    Which as you should note is not time reversal but the reversal of a process

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    Last edited: Jul 4, 2018
  20. Sarkus Hippomonstrosesquippedalo phobe Valued Senior Member

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    It would be just like watching a movie in reverse. You see a window shatter, the pieces fly everywhere, in reverse you see all these tiny fragments come together to form a window. You see people regurgitate their food whole again, you see rain rise to the sky, people walking backwards, old people getting young, young people becoming unborn. Buildings are dismantled from the top down, volcanoes suck in all the ash, lava and smoke and then settle down until they suck in more.
    Movie in reverse. That's all you'd see. Unless you interacted with it on your journey, of course.
     
  21. Gawdzilla Sama Valued Senior Member

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    Can I skip the childunbirth images, please.
     
  22. DaveC426913 Valued Senior Member

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    Wait. This has nothing to do with time travel.

    It would be just as easy - or just as hard - to put all the buildings from 9/11 back in place on 9/12 by any method - whether or not time travel was involved. Time travel is irrelevant to that scenario.

    AS far as the engineering effort of building on top of rubble - it makes no difference to where the materials were transported from. Saying they came from "the future" doesn't make it any different than saying they came from "a warehouse down the block".
     
  23. DaveC426913 Valued Senior Member

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    Men spend 24 hours trying to escape a woman's vagina. And then the next 70 years trying to get back in.
     

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