The term "duality of existence" does not have a specific scientific or philosophical meaning that is widely recognized. However, in a broader context, it could refer to the idea that existence or reality can be understood or experienced in multiple ways or through different perspectives.
In philosophy and metaphysics, various dualities or dichotomies have been proposed to describe and understand different aspects of existence. These dualities often present contrasting or complementary concepts that help to explore and analyze different aspects of reality. Some examples of dualities in philosophy include mind and body, subject and object, material and immaterial, determinism and free will, and so on. These dualities often reflect different perspectives or ways of conceptualizing and experiencing existence.
In physics, there are also certain dualities that arise in the study of fundamental particles and forces. For example, there is the wave-particle duality that we discussed earlier, which describes the dual nature of particles as both discrete particles and waves. Another example is the duality between electricity and magnetism in electromagnetism, as described by Maxwell's equations. These dualities help us understand and describe different aspects of physical phenomena.
In summary, while the specific term "duality of existence" may not have a universally accepted meaning, the concept of dualities, whether in philosophy or physics, often highlights the idea that existence can be understood or experienced from multiple perspectives, with contrasting or complementary aspects playing a role in our understanding of reality.