Third law reaction question

[bstruss]

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 (http://www.aboutamelia.com/em%20reaction.gif)

[Thomas]

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.

[Alexander]

Thomas, may be you need to use Lorents transformations (instead of Galilean) between systems?