For physicists of that time any deviation from classical Newtonian mechanics was mind bending. Trying to merge the old and new realms of physics they have invented many new concepts which at the time help to propel the discussion toward a better common understanding. those concepts have been passed from one generation of physicists to another. However, some of those concept do not have so much of importance anymore as they had it during the years of the building of the new theory. Uncertainty Principle, or a wave-particle duality are examples of such concepts.
Almost a hundred years later physicists know much more about the fundamental properties of quantum matter.
The existence of non-commutative physical quantities is one of the most important properties of the quantum world; non-commutative quantities do not exist for macroscopic objects.
At the beginning of this piece I also mentioned a wave-particle duality. It was invented to "reconcile" particle-like existence with wave-like behavior of quantum objects. Now this concept lost its usefulness. There is no duality, all quantum objects are particles, but they may behave in such a way that looks like a wave.
There are many good popular science books, including on the history, origins, meaning of quantum mechanics. One I read recently is
This book, however, as many other books on the matter, are completely misleading when they start talking about single-photon experiments.
the Schrodinger equation is not relativistic. It is like analyzing length contraction or time dilation to better understand how Newtonian mechanics works.
More on quantum entanglement at: “Thinking about the origins of the Quantum Mechanics.”
An example of the inter-connection between micro and macro worlds: “Dark matter, dark energy and light-vacuum interactions.”
Dr. Valentin Voroshilov
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