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=== Quantization of matter ===
In 1924 [[Louis de Broglie]] proposed that electrons in an atom are constrained not in "orbits" but as standing waves. In detail his solution did not work, but his hypothesis – that the electron "corpuscle" moves in the atom as a wave – spurred [[Edwin Schrodinger]] to develop a [[Schrodinger equation | wave equation]] for electrons; when applied to Hydrogen the Rydberg formula was accurately reproduced. This success launched a new fundamental understanding of our world: quantum mechanics.
Planck and Einstein started the revolution with quanta that broke down the continuous models of matter and light. Twenty years later "corpuscles" like electrons came to be modeled as continuous waves. This result came to be called wave-particle duality, one iconic idea along with the uncertainty principle that sets quantum mechanics apart from older models of physics.
=== Quantum radiation, quantum fields ===
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