Mostly it means that we don’t yet have an entirely clear picture of what a particle actually is.
When we try to measure them like particles we observe particle-like behavior (they have a discrete location or momentum, they ricochet off each other, etc) and when we try to measure them like waves they exhibit wave-like behavior (ex., create interference patterns with each other). They’re mostly likely something else entirely that exhibits these properties but we don’t know what that thing is.
I think the dominant model at the moment is Quantum Field Theory, which holds that every type of particle has a field and what we see as particles are points in that field where it has enough energy to be observed.
Latest Answers