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Preservation of information ?

  1. Jan 22, 2007 #1
    When working with data, one should see that information can not be created except for random ones. Should there be a law of information preservation?
     
  2. jcsd
  3. Jan 22, 2007 #2
    hmmm, like entropy? Im still a noob at physics, but that sounds kind of like entropy.
     
  4. Jan 22, 2007 #3
    Well, it sounds nice. But I think we shoud define clearly the term information?
     
  5. Jan 22, 2007 #4

    Claude Bile

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    Science Advisor

    There is no such thing as 'random' information, a random arrangement of particles for example, contains NO information.

    Information can be created, but always at the expense of energy.

    Information does have a precise definition, and it is linked with the definition of entropy.

    http://en.wikipedia.org/wiki/Entropy

    Check out section 3.3 for a reference to information theory.

    Claude.
     
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