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Thread: Questions on the test that led to Many Worlds

  1. #1 Questions on the test that led to Many Worlds 
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    Hello,

    This concerns the test where you have a barrier with two slits cut out of it, set in front of a wall or blackboard (or something that will show hits upon it) and devices that will shoot sub-atomic particles.

    My understanding is this: when particles are shot into the barrier with two slits, you get a wave-like pattern on the wall behind it. However, if you watch the barrier (or take measurements?) to see where the particles are going, the pattern on the wall changes and you get two lines with no wave-like interference pattern.

    There is a goofy little video that shows this test here: http://www.youtube.com/watch?v=1KN6a8inOF8
    The test is shown about half way through the video.

    I hope that I can find someone who knows the details of this test. I of course find it very hard to believe and want to find out just how deep the rabbit hole goes. I’d heard of this test and the implications long ago but somehow I missed the part about the sub-atomic particles changing their patterns from wave-like to particle-like when ‘watched’.

    My first questions are the obvious ones:

    Do I understand correctly that completely non-evasive and passive acts of ‘watching’ or ‘measuring’ really cause a change in how the particles acted?

    Exactly how was the barrier ‘watched’ or ‘measured’?

    Searches using ‘Many Worlds’ has not shed light on these questions… does the test have a name or, what search would get me to more information?

    Any help will be greatly appreciated!

    Regards,
    Rusty


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  3. #2 Re: Questions on the test that led to Many Worlds 
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    Quote Originally Posted by rrw4rusty
    Hello,

    This concerns the test where you have a barrier with two slits cut out of it, set in front of a wall or blackboard (or something that will show hits upon it) and devices that will shoot sub-atomic particles.

    My understanding is this: when particles are shot into the barrier with two slits, you get a wave-like pattern on the wall behind it. However, if you watch the barrier (or take measurements?) to see where the particles are going, the pattern on the wall changes and you get two lines with no wave-like interference pattern.

    There is a goofy little video that shows this test here: http://www.youtube.com/watch?v=1KN6a8inOF8
    The test is shown about half way through the video.

    I hope that I can find someone who knows the details of this test. I of course find it very hard to believe and want to find out just how deep the rabbit hole goes. I’d heard of this test and the implications long ago but somehow I missed the part about the sub-atomic particles changing their patterns from wave-like to particle-like when ‘watched’.

    My first questions are the obvious ones:

    Do I understand correctly that completely non-evasive and passive acts of ‘watching’ or ‘measuring’ really cause a change in how the particles acted?

    Exactly how was the barrier ‘watched’ or ‘measured’?

    Searches using ‘Many Worlds’ has not shed light on these questions… does the test have a name or, what search would get me to more information?

    Any help will be greatly appreciated!

    Regards,
    Rusty
    Here is one detailed description, from Wiki, with pictures.

    You can find other discussions in many good books. One that I can recommend is a book by Silverman called More Than One Mystery which also has pictures of the interference pattern being formed one particle at a time.

    This experiment DID NOT lead to the many worlds interpretation of quantum mechanics. Neither did any other experiment.

    The "many worlds" interpretation of quantum mechanics was introduced in the Ph.D. dissertation of High Everett under John Archibald Wheeler. It is just that, an interpretation.

    An interpretation is nothing more than a "story" that explains the predictions of the theory. The many worlds interpretation provides precisely the same predictions as does the standard Copenhagen interpretation, and should not be confused as being a factual explanation of what occurs when the wave function collapses in quantum theory. It might or might be true, but it makes no difference as it is in principle impossible to distinguish the many worlds picture from the Copenhagen picture with any experiment.


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  4. #3  
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    Hi,

    Thanks for replying and clearing some things up (and bringing other into non focus, lol).

    r
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  5. #4 quantum information travels backwards in time 
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    It is theorized by some that quantum information can travel backwards in time. This (I think) negates the need for the many worlds interpretation and would explain much (if not all) of the wierdness of the double slit experiment etc. and conciousness.
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  6. #5  
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    That would just be a different interpretation of QM.
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  7. #6 Re: quantum information travels backwards in time 
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    Quote Originally Posted by zzpluralz
    It is theorized by some that quantum information can travel backwards in time. This (I think) negates the need for the many worlds interpretation and would explain much (if not all) of the wierdness of the double slit experiment etc. and conciousness.
    Theorized or hallucinated ?
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  8. #7 Re: quantum information travels backwards in time 
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    Quote Originally Posted by zzpluralz
    It is theorized by some that quantum information can travel backwards in time. This (I think) negates the need for the many worlds interpretation and would explain much (if not all) of the wierdness of the double slit experiment etc. and conciousness.
    Recently read where tests were done showing that the human brain gets information from distant nerves 'instantly' (faster then light) -- it was in a piece about sub-atomic particles traveling backward in time.

    Crazy stuff. Certainly enough to make one hallucinate.

    Rusty
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  9. #8 Re: quantum information travels backwards in time 
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    Quote Originally Posted by rrw4rusty
    Recently read where tests were done showing that the human brain gets information from distant nerves 'instantly' (faster then light) -- it was in a piece about sub-atomic particles traveling backward in time.

    Crazy stuff. Certainly enough to make one hallucinate.
    Check your sources.

    I read something similar recently. The head of the institute where the research was performed claims to be the reincarnation of a warlord who reigned over Atlantis 35000 years ago.
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