Dirac discovers an ulterior, profound simplification of our description of nature: the convergence between the notion of particles used by Newton, and the notion of fields introduced by Faraday. The cloud of probability that accompanies electrons between one interaction and another does resemble a field. Faraday’s and Maxwell’s fields, in turn, are made up of grains: photons. Not only are the particles in a certain sense diffused in space like fields, but the fields interact like particles. The notions of fields and particles, separated by Faraday and Maxwell, end up merging in quantum
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