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Thread: Testing the Equivalence Principle near a black hole

  1. #1
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    Testing the Equivalence Principle near a black hole

    Hi,

    They are claiming to have studied the aforementioned principle here:
    https://phys.org/news/2019-03-einste...ive-black.html

    But I cannot find their conclusion anywhere. Do I need to purchase the article?


    Regards,
    philippeb8


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  2. #2
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    I think their conclusion is in the article (my bold):

    By measuring the difference in frequency change for both atoms we were able to give an upper limit on the LPI violation during the pericenter passage. If there was an obvious violation of LPI, we should have measured very different vibration of light waves, from the helium and hydrogen lines."
    Best as I can tell they were "simply" trying to measure that upper limit.

  3. #3
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    Quote Originally Posted by schlaugh View Post
    I think their conclusion is in the article (my bold):



    Best as I can tell they were "simply" trying to measure that upper limit.
    So does that mean GR passed or failed?


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  4. #4
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    Neither. They were testing an aspect of GR to establish certain limits. If I read it correctly those limits were determined (details of which are probably buried in the paper). IOW they established a data point for one aspect of GR. I suppose the most they would say is that their work provides evidence which supports one aspect of GR.

  5. #5
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    Quote Originally Posted by schlaugh View Post
    Neither. They were testing an aspect of GR to establish certain limits. If I read it correctly those limits were determined (details of which are probably buried in the paper). IOW they established a data point for one aspect of GR. I suppose the most they would say is that their work provides evidence which supports one aspect of GR.
    Ok thank you very much!


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