In quantum physics, the wave-particle duality suggests that particles, including fundamental particles like electrons and photons, can exhibit both wave-like and particle-like behavior. However, it is important to note that the statement "everything is a wave" does not imply that macroscopic objects, such as everyday objects or larger systems, exhibit the same wave-like behavior as fundamental particles.
The wave-like behavior of macroscopic objects is not typically observed in everyday life because it becomes increasingly difficult to observe quantum effects on larger scales. Macroscopic objects, due to their interactions with the surrounding environment, quickly lose their quantum coherence, which means their wave-like behavior is not easily detectable.
While quantum mechanics provides a mathematical framework to describe the wave-like behavior of particles, the principles and equations of quantum mechanics are typically not applicable or necessary to describe macroscopic objects. Instead, classical physics, which does not incorporate quantum effects, is usually sufficient for describing the behavior of macroscopic objects.
So, the wave-like qualities of macroscopic objects are not as apparent as they are for particles on the quantum scale. Understanding macroscopic objects primarily involves classical physics and classical concepts, such as Newtonian mechanics and thermodynamics, which provide effective models for describing their behavior.
In summary, the statement "everything is a wave" in the context of quantum physics refers to the wave-particle duality exhibited by fundamental particles. While the wave-like behavior is fundamental to the quantum realm, it does not directly apply to macroscopic objects, and classical physics provides a suitable framework for understanding their behavior.