We have mentioned it already, and probably will a couple more times again in this book: the quantum world is weird. The elementary particles that constitute all matter (that we know of, at least), behave in a very weird and counterintuitive way. At the heart of all this lies the wave-particle-duality. Although the elementary particles are indivisible and fundamental (again, as far as we know), they do not move about like tiny, hard balls. Instead, the way they move and interact is far more like waves.
KeywordsWave Function Wave Packet Sound Wave Uncertainty Principle Quantum World
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