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Third law reaction question

  1. May 10, 2003 #1
    I have attached a drawing that depicts the situation of two electromagetic coils in space seperated by a vast distance. It seems to me that in this case there would be a magnetic action force on the right coil but no reaction on the left coil. I'm probably missing something here but I would appreciate any pointers on what that might be. If the description or graphic is unclear, please let me know.

    Thanks!

    Illustration
     
    Last edited by a moderator: May 10, 2003
  2. jcsd
  3. May 12, 2003 #2
    Newton's third law (in fact, the force concept as such) only holds if the propagation speed of the interaction is infinite. I have examined a similar problem (a retarded interaction when the objects are moving relatively to each other) on my webpage http://www.physicsmyths.org.uk/retard.htm.
     
  4. May 13, 2003 #3
    Thomas, may be you need to use Lorents transformations (instead of Galilean) between systems?
     
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