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Uncertainty Principle Question

  1. Apr 11, 2007 #1
    Let's say a proton is confined to some diameter, d. What would be the uncertainty in the position?

    In some questions they use delx as (1/2)d as the uncertainty in position. In other cases they use the entire d as the uncertainty. This is extremely confusing...
    Last edited: Apr 11, 2007
  2. jcsd
  3. Apr 12, 2007 #2
    Must be d/2

    If I guess that the proton is in the middle, then the most I can be wrong by is d/2.
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