What does interaction means?

  • #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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  • #2
dextercioby
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It needn't be a contact. Interaction is a word for 'influence'.
 
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  • #3
UltrafastPED
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For example, there is a force between them - gravitational, electric, magnetic, etc.
 
  • #4
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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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