The real world, as we commonly experience it, is not generally described by quantum mechanics at macroscopic scales. Instead, classical physics, which includes Newtonian mechanics, electromagnetism, and thermodynamics, provides accurate descriptions for many everyday phenomena. Quantum mechanics becomes significant and necessary when dealing with microscopic systems, such as atoms, molecules, and subatomic particles.
However, it's worth noting that the underlying nature of reality, at its fundamental level, is still a subject of scientific investigation and philosophical debate. Quantum mechanics is a highly successful and well-tested theory that accurately describes the behavior of particles at the quantum level. It introduces concepts such as superposition, entanglement, and wave-particle duality, which have been experimentally verified.
While quantum mechanics is not the dominant framework for describing macroscopic objects due to the principles of superposition and entanglement not being as evident at larger scales, there are ongoing research efforts to explore potential quantum effects in larger systems. Quantum technologies, such as quantum computing and quantum communication, are advancing rapidly and may eventually have significant impacts on various fields.
In summary, while our everyday experiences can be adequately described by classical physics, the fundamental nature of reality is still a subject of investigation, and quantum mechanics provides a powerful framework for understanding the behavior of particles and systems at the quantum level.