A

David

Darling

action at a distance

Action at a distance is the idea that forces between objects, such as gravity, operate without any intervening mechanism. As originally conceived, in Newton's theory of gravity, action at a distance was seen as occurring instantaneously, regardless of the distance involved. Today, it is recognized that interactions involve a time delay that cannot be less than the time taken for light to cross the distance involved.




Related category

   •CLASSICAL MECHANICS

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