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What does interaction means?

  1. Sep 3, 2013 #1
    when we say two masses or charges or particles interacts with each other, we have used the word interacts, what does that mean, does that mean a physical contact or something of that kind?
     
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  3. Sep 3, 2013 #2

    dextercioby

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    It needn't be a contact. Interaction is a word for 'influence'.
     
  4. Sep 5, 2013 #3

    UltrafastPED

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    For example, there is a force between them - gravitational, electric, magnetic, etc.
     
  5. Sep 5, 2013 #4
    You and me are interacting and you could be in China for all I know. There just needs to be a two-way dependency for there to be an interaction, no requirement that the dependency is based on contact.

    Contact itself is a slippery notion.
     
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