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

Are Physical Laws Arbitrary?

  1. Nov 8, 2005 #1
    If there were other universes being created all the time (and thats a big if), do you think that the laws would be different or would they all follow the same basic physical laws?
     
  2. jcsd
  3. Nov 8, 2005 #2

    Danger

    User Avatar
    Gold Member

    While the basic laws might not be variable, the constants would almost certainly be different.

    I think... :uhh:
     
  4. Nov 8, 2005 #3
    Well all the laws, equations in physics and even chemistry 'd be same through out our universe and will not be affected by the creation of any other universe no matter where or when. But it is very certain that all the laws in our universe may not hold same in any other universe, there e may not be equal to mc^2, proton may not be stabe or something so on........
     
  5. Nov 9, 2005 #4
    The fact that an object at relative rest has total energy E = mc^2, in all its relevance as a conserved quantity, can be derived from the homogeneity of time (the fact that now is not fundamentally different than later). Of course, we must also agree that our universe is a four dimensional manifold and that there exists a maximum relative speed, but these are reasonable requirements.
     
  6. Nov 10, 2005 #5
    It depends. If "someone" were to create an entirely different universe based on some different substances who is to say that everything can't be different? Maybe he will get bored with all this "spinning spiral" nonsense and use straight lines and squares? Of course, you can't really answer this question with science because no experimental evidence exists to talk about such alternative universes (all science can do is attempt to describe the universe we are in and the things that appear to be constant in it).
     
  7. Nov 10, 2005 #6
    Is there anything that forbids the constants or laws to change?

    Would the physical laws apply the same way in 3D to multidimensional universes?...I am guessing that it would not be the same.
     
  8. Nov 10, 2005 #7

    ahrkron

    User Avatar
    Staff Emeritus
    Gold Member

    The problem with this question is that it is hard to make it precise.

    To imagine a 5D universe, we already need to disregard some facts of what we do observe. Once this first step is taken, one needs to define a bound to the kind of changes that we are willing to accept; otherwise, any physical law can be tossed just as the number 3 for the number of spatial dimensions.
     
  9. Nov 10, 2005 #8
    When I create my first new universe I'll let you know. :biggrin:

    Pete
     
  10. Nov 10, 2005 #9
    Well eulicd said universe can only exist in 3 dimension, then came Einstein and said 3 dimensions r not enough and introdused 4th. Now string theorists suggested there are 11 dimension, which is hardly doubted. But the bottomline is E has always been equal to mc^2.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Are Physical Laws Arbitrary?
  1. Laws of physics (Replies: 7)

Loading...