Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Is moon there or not

  1. Nov 28, 2003 #1
    how special and the general relativity explains the position of moon from the earth reference system taking also into account the heisenberg uncertaintity problem.
    when we look at the moon from the earth what is the indeed position of it. what is the error.
  2. jcsd
  3. Nov 28, 2003 #2
    This doesn't have anything to do with relativity: you can ask the same question in non-relativistic quantum mechanics, or relativistic quantum field theory. This is just an issue of quantum mechanical measurement. Skipping the issue of what constitutes a "measurement", quantum mechanics says that the Moon does have a definite position if we measure its position.
  4. Nov 28, 2003 #3
    One might ask, what more can be proved to exist than the quantum object of one's immediate measurement?

    If h were set to zero, though, the moon would be observed to obey ultimately geometrodynamics, of all our remaining theories. Measurement would then be a process of continuous action and reaction rather than a statistical correlation between discrete quanta.
  5. Nov 28, 2003 #4


    User Avatar
    Staff Emeritus
    Science Advisor

    The moon is moving much too slowly, relative to the earth, for any relativistic effects to be noticable. The moon is much to large for quantum effects to be noticable. The moon is exactly where it appears to be!
  6. Dec 7, 2003 #5


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    what, just over the treetops? :wink:
  7. Dec 9, 2003 #6


    User Avatar
    Staff Emeritus
    Science Advisor

    Hmmm, when I looked it was just below the treetops! Is this a quantum or relativistic effect?
  8. Dec 9, 2003 #7
    I can't see the moon from the trees! (As a matter of fact, it's all dark.)
  9. Dec 10, 2003 #8


    User Avatar

    It is in a slightly diffrent position because the light takes time to reach us.... but like they said the quantum effects would probably be to small to make the moon appear were it is not....
  10. Dec 15, 2003 #9
    Your understanding of physics is quite off. First off, the heisenberg uncertainty principle has absouloutly nothing to do with the moon. Secondly, GR and SR and about 100 years after Newton figured the rotation of the moon.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Is moon there or not
  1. The moon (Replies: 1)

  2. Tethered to the Moon (Replies: 4)

  3. Moon drifting away? (Replies: 2)

  4. "Moon Ben" dilemma (Replies: 10)