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Statistical Physics

  1. Sep 8, 2013 #1
    Please help me, what are micro and macrostates, what are accessible states?
  2. jcsd
  3. Sep 8, 2013 #2


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    Last edited: Sep 8, 2013
  4. Dec 5, 2015 #3
    Consider five coin tosses. I would call each of the possible outcomes a microstate (for example, HTTHT, THHHT, HHHTH, TTTTT and so on. H stands for heads and T for tails).

    Now suppose I define a variable such as X=Total number of heads. For the microstates I have mentioned above, X will take values 2, 3, 4, 0 and so on. X is a macrostate. It tells you nothing about the specific configuration of the system. For example, X=4 will correspond to five microstates (HHHHT, HHHTH, HHTHH, HTHHH, THHHH), but you have no way of knowing which one.

    An accessible state is a microstate the system can take without violating any laws governing the system.

    I hope it is clear now.
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