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

About the arbitrary elements

  1. Mar 21, 2006 #1
    Hey, I read about arbitrary elements sometime ago. Could anybody tell me what affects the values of these? And I also read that some say that the values of these are fine-tuned by the Creator. What is the general take on that?
  2. jcsd
  3. Mar 21, 2006 #2


    User Avatar
    Science Advisor

    What "Creator"? What arbitrary elements?
  4. Mar 21, 2006 #3
    You may be thinking of the book by Martin Rees called just six numbers and offshoots of this.

    The general properies of the universe are governed by a few constants that determine the relationship between various physical quantities

    I wil use martin rees' numbers in the order he gave them in the book but use my own descriptions of them

    The first Possibly the most vital is the relative strengths of gravitational and electromagnetic forces which is huge. This allows the universe to be very big because atoms are much smaller than gravitating objects ie you need a very great many atoms to create a significant gravitiational field.

    another number defines how small nucleii will be in relation to the electon cloud. this is very finely balanced to allow a reasonable number of stable atoms to form and transmute into each other via interactions at high temperatures and pressures but not too many or too few too fast or too slow. This allows stars and all the materials the we encounter in our lives to form and last for a long time.

    the next defines how much material there is to definr the shape of space whic turns out to be pretty well flat.

    Then there is the expansion rate of the universe

    the next is rather abstruse and measures the binding energy of large structures like galaxies and how quickly things tend to collapse under self gravitiation

    The last one is the number of spatial dimensions.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook