|Dualism: the idea that the entities in a considered domain cannot be unified. In philosophy e.g. spirit and matter. Monism in contrast, confirms that unity is possible and that a separateness can not be claimed. Sie also property dualism, monism.|
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Wave/Particle/Dualism/Feynman: there is no difference between wave and particle. Quantum mechanics unites the idea of the field and the wave and the particle into a whole.
Now it is true that at low frequencies the wave properties are more apparent or more practical than an approximate description of everyday experiences. As the frequency increases, the particle properties become more and more evident in the instruments with which we normally perform our measurements.
Wave/Particle/Quantum Mechanics/Feynman: Quantum mechanical objects do not behave like particles and they do not behave like waves.
There is a favorable circumstance: the electrons behave in the same way as light (which is not itself a wave or a particle).
The quantum behavior is the same for all, whether photons, electrons, protons, neutrons.
Vom Wesen physikalischer Gesetze München 1993
Vorlesungen über Physik I München 2001