The Mystery of particle-wave duality: Or why footballs don’t diffract into goals

Robert Lea
Sep 2, 2018 · 10 min read

One of the most astounding and controversial outcomes of the early investigation of quantum physics was the discovery that light acts as both a particle and a wave, the so-called particle-wave duality of matter. Physicists went further though, discovering it was not just light that behaved as if it were a particle and a wave depending on the conditions under which it was observed. All matter, up to a certain limit, behaves this way. How could something be both a particle and a wave? The answer is that if it is neither

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