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  1. #11
    The Dark Lord The Wailing Specter's Avatar
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    Quote Originally Posted by Mole View Post
    As we approach the speed of light, time slows down, so that at the speed of light, time stops. This means that a light photon leaves the Sun at exactly the same time as it reaches the Earth. So for the light photon, no time elapses on its journey form the Sun to the Earth.

    This is counter-intuitive for us because we only experience time from our point of view not from the point of view of a photon travelling at the speed of light.

    So asking whether we can travel back in time is the naive and intuitive question, limited by our point of view, our own limited experience of time.

    And asking whether we can travel back in time is parochial and childlike.
    COOL! So if photons were intelligent, we could see all of time and space at once?
    The rest of the universe would have to be going infinitely fast, and the photon would be frozen in time (Timeless, unaging as it sped through the universe at the speed of light).
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  2. #12
    Senior Member INTP's Avatar
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    No and everyone who believes that is a fool. In order to move back in time, you would need to move the entire universe(that includes all the light, atoms etc in exact same order) back to the position that it was back in where you would want to go to and then somehow after moving it back, make it start to move again the way they did move. I mean if you push a ball away from you in space, it doesent come back to you, but the force keeps pushing it away till some other force pulls it towards it, so this is something that you would need to deal with as well. Not to mention that if you move the entire universe back, you are moving yourself back too and if you arent, the time isnt moving backwards, but the objects are..

    Even with this quantum superposition thing that caused the article to gain that misleading title, you arent actually going back in time, you are just sort of creating an alternative reality, or positioning two similar universes close to each other so that they overlap(if looked from the perspective of multiverses). What they say on the article reinforces my multiverse theory i came up with years ago, not the idea of time travel..

    I didnt watch the lecture yet(i might later), but i doubt it will change my position on this.
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  3. #13
    Senior Member INTP's Avatar
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    Quote Originally Posted by Magic Qwan View Post
    COOL! So if photons were intelligent, we could see all of time and space at once?
    The rest of the universe would have to be going infinitely fast, and the photon would be frozen in time (Timeless, unaging as it sped through the universe at the speed of light).
    What he told about time slowing down when approaching the speed of light and time stopping when moving at the speed of light isnt really true. Time is nothing but a movement of something in relation to something else and light has the fastest speed. If you go beyond the edges of the universe(where light havent gotten yet), thats where time doesent exist(is at zero) because there is nothing moving in relation to anything.

    What he is saying about this time not moving for the light and that for it its the same moment it leaves the sun as it is when it hits the earth, is based on studies showing that particles are decaying slower than they should when they move fast enough. But this time stopping for them is just a hypothesis that really has no meaning for anything. The thing is that if you take an atom for example, there is stuff "spinning inside of it", and if you make it move at the speed of light one of the things would need to move faster than the speed of light for the spin to actually continue, but because its impossible to move faster than the speed of light, the spin slows down the closer you get to the speed of light. It doesent mean that the time will stop for the atom, it just means that it doesent spin and thus does not decay and is sort of frozen, but because the atom(or photon in the case of light) is still moving in relation to everything else, the time doesent really stop and the speed of time is not zero. All that stuff about being able to see through time or all space is just people imagination going wild and no, its not possible either. If you move at the speed of light, your eyes dont work until you slow down.
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  4. #14
    The Dark Lord The Wailing Specter's Avatar
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    Quote Originally Posted by INTP View Post
    What he told about time slowing down when approaching the speed of light and time stopping when moving at the speed of light isnt really true. Time is nothing but a movement of something in relation to something else and light has the fastest speed. If you go beyond the edges of the universe(where light havent gotten yet), thats where time doesent exist(is at zero) because there is nothing moving in relation to anything.

    What he is saying about this time not moving for the light and that for it its the same moment it leaves the sun as it is when it hits the earth, is based on studies showing that particles are decaying slower than they should when they move fast enough. But this time stopping for them is just a hypothesis that really has no meaning for anything. The thing is that if you take an atom for example, there is stuff "spinning inside of it", and if you make it move at the speed of light one of the things would need to move faster than the speed of light for the spin to actually continue, but because its impossible to move faster than the speed of light, the spin slows down the closer you get to the speed of light. It doesent mean that the time will stop for the atom, it just means that it doesent spin and thus does not decay and is sort of frozen, but because the atom(or photon in the case of light) is still moving in relation to everything else, the time doesent really stop and the speed of time is not zero. All that stuff about being able to see through time or all space is just people imagination going wild and no, its not possible either. If you move at the speed of light, your eyes dont work until you slow down.
    I write Sci-Fi. We writers botch the details sometimes, so thank you for clarifying.
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  5. #15

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    Quote Originally Posted by Mal12345 View Post
    Never say never! After all, @Mole was tempbanned and a lot of us thought that would never happen either.
    huh? what? what! dear Mole tempbanned? well i guess it is possible - in an infinite universe everything has a probability of one - but in his universe? how did this ... happen?

  6. #16
    Google "chemtrails" Bush Did 9/11's Avatar
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    Quote Originally Posted by st-t-toat View Post
    huh? what? what! dear Mole tempbanned? well i guess it is possible - in an infinite universe everything has a probability of one - but in his universe? how did this ... happen?
    Maybe Islamophobia.
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  7. #17
    Senior Member Mal12345's Avatar
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    Quote Originally Posted by jscrothers View Post
    Yeah, I still need to figure that one out. Experientially, if possible.
    Watch this movie, and you'll soon understand backwards time travel.

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  8. #18
    AKA Nunki Polaris's Avatar
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    The past is not a location like Italy or the grocery store that you could travel to if only the proper route were open. The past consists of memories, echoes, and afterimages, as well as rust and wrinkles. That's it. If there is actually some location where a duplicate of the past universe exists (as far as anything can be a genuine duplicate) it's a very strange fact of reality for which there is currently zero evidence. Another way of getting to the past would be reconstructing it, which, if done on any appreciable level with any appreciable degree of accuracy, would probably require technology billions of years in advance of ours.

    On the other hand, I do think the present shapes the past, just as the past shapes the present. That isn't the same thing as time travel, though, and it generally manifests itself in extremely mundane ways.
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  9. #19
    Senior Member Mal12345's Avatar
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    Quote Originally Posted by Polaris View Post
    The past is not a location like Italy or the grocery store that you could travel to if only the proper route were open. The past consists of memories, echoes, and afterimages, as well as rust and wrinkles. That's it. If there is actually some location where a duplicate of the past universe exists (as far as anything can be a genuine duplicate) it's a very strange fact of reality for which there is currently zero evidence. Another way of getting to the past would be reconstructing it, which, if done on any appreciable level with any appreciable degree of fidelity, would probably require technology billions of years in advance of ours.

    On the other hand, I do think the present shapes the past, just as the past shapes the present. That isn't the same thing as time travel, though, and it generally manifests itself in extremely mundane ways.
    In other words, the future shapes the present.
    "Everyone has a plan till they get punched in the mouth." Mike Tyson
    “Culture?” says Paul McCartney. “This isn't culture. It's just a good laugh.”

  10. #20

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    Quote Originally Posted by jscrothers View Post
    Maybe Islamophobia.
    the veil between "moor" and "excess" is currently v thin indeed

    but not for Mole - Mole, surely, is the archetypal ... humanist?

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