The complementarity principle is inextricably linked with Heisenberg's uncertainty principle.
Whereas the uncertainty principle is a mathematical statement about the quantum world, the complementarity principle is a philosophical and comprehensive statement about the quantum world.
The complementarity principle can be understood as an epistemological framework for understanding the uncertainty principle.
In 1927, Physicists at the Copenhagen School centered on Bohr, discovered the complementarity principle following the uncertainty principle, and finally arrived at a consistent interpretation of quantum theory.
This is often referred to as the “Copenhagen Interpretation”. Thus, the sprout of quantum theory, which began with Planck's quantum hypothesis in 1900, was established as a systematic theory in 27 years.
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