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Post by faustus5 on Oct 9, 2019 14:39:02 GMT
You obviously know your physics better than I ever will, but I was thinking strictly in terms of things actually happening in real time, which is transactional and always involves particle exchange. There's many cases where no particles get exchanged. Another common form of energy, kinetic energy, can be transferred from one body to another with no particles getting exchanged. For example the Voyager flybys of Jupiter imparted enough energy on the spacecraft to allow them to reach escape velocity from the sun, kinetic energy which they didn't have prior to their encounters with Jupiter. In quantum physics particle mediators are usually associated with (dynamic) forces, not energy. Well, I'll have to defer to you on this, but when I did my homework I encountered scientists saying stuff like "No matter what the interactions are, energy is never seen to exist on its own, but only as part of a system of particles, whether massive or massless" or "There is one form of energy, however, that may not need a particle at all: dark energy." Is there maybe some semantics involved? Dunno, it's beyond my pay grade.
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