Quote: in quantum mechanics the force concept is replaced by the concepts of energy and momentum, frequencies and wavelengths

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quantum mechanics
quantum electrodynamics
electromagnetic field

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There are many changes in what concepts are … In particular, the force concept gradually fades away, … In [the probability] amplitudes there are wavelengths related to … Instead of forces, we deal with the way … Nobody ever differentiates the energy to find out … It is, in fact, just because momentum and … [the vector and scalar potentials] provide the most direct way of introducing electromagnetic effects into …   Google-1   Google-2

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Quote: use vector and scalar potentials for introducing electromagnetic effects into quantum descriptions; avoids the use of force concepts

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