Briefly on Bohr and complementarity.

 

My understanding is that complementarity was proposed following the EPR publication, It can be stated as : that a single quantum can exhibit a particle-like \emph{or} a wave-like behavior, but never both at the same time.

That does seem like quite a " bold " assertion, but was widely, almost unanimously , agreed to by the scientific community of that time, and still widely supported today.

Whether a quantum is clearly defined or not, it's somewhat  safe to say that this represents a duality in thinking about the physical world, which I kind of believe was significantly addressed by David Bohm in the 1990's and his book : The Undivided Universe.

Nevertheless, we see this kind of assertion made about a variety of subjects in our social, economic, and political arenas, with bold assertions about something can be either - of one particular nature or the other.  

Of course, if one follows this stuff, it is difficult to avoid the issue of the " collapse " of the wave equation, as relates to distinctive change of state in a system.  

At any rate, I do suspect that these concepts apply in many other areas of scientific thought, and would also probably connect back even to phycology.


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