Richard Feynman, a renowned physicist, made significant contributions to the field of quantum mechanics. While Feynman was known for his deep understanding and advocacy of quantum theory, it would be an oversimplification to state that he believed the classical world is entirely illusory.
Feynman recognized the power and accuracy of quantum mechanics in describing the behavior of particles at the microscopic scale. He famously stated that "nobody understands quantum mechanics," emphasizing the puzzling and counterintuitive nature of the theory. Feynman's approach to quantum mechanics focused on developing intuitive explanations and visualizations, such as his Feynman diagrams, to help understand and work with the mathematical formalism of quantum theory.
However, it is important to note that Feynman did not reject the classical world or consider it entirely illusory. He acknowledged that classical physics, which includes Newtonian mechanics and other well-established theories, provides an accurate description of macroscopic objects and everyday phenomena. Feynman's perspective did not entail dismissing classical physics as an illusion arising from quantum processes.
Feynman's viewpoint can be summarized as follows: Quantum mechanics is a fundamental theory that accurately describes the behavior of particles at the microscopic scale, while classical physics provides a useful and valid framework for understanding the macroscopic world. Feynman emphasized the need to reconcile these two realms, and he made efforts to explore quantum phenomena and bridge the gap between quantum and classical physics.
In summary, while Feynman had a profound appreciation for the power of quantum mechanics, he did not believe that the classical world is entirely illusory. He recognized the complementary nature of quantum and classical physics, and his work focused on advancing our understanding of both realms and their interconnections.