The Heisenberg Uncertainty Principle is a fundamental principle in quantum mechanics that states that certain pairs of physical properties, such as position and momentum, cannot both be precisely determined simultaneously with arbitrary accuracy. It is not limited to electrons and protons but applies to all quantum particles, including atoms, molecules, and larger systems.
While it is true that the quantization of orbital angular momentum and spin is specific to particles with intrinsic angular momentum (like electrons and protons), the Heisenberg Uncertainty Principle is a more general concept. It arises from the wave-particle duality of quantum objects and the fundamental nature of quantum measurements.
The uncertainty principle is not limited to the precise measurement of orbital angular momentum or spin. It relates to the fundamental limits in simultaneously measuring pairs of complementary observables, such as position and momentum, energy and time, or angular momentum components in different directions. These uncertainties are inherent in the wave-like nature of quantum objects and are not restricted to specific particles or their intrinsic properties.
Even for macroscopic objects, which consist of a large number of particles, the uncertainty principle can still be relevant. While the effects may be negligible and difficult to detect at larger scales, the uncertainty principle places fundamental limits on our knowledge of the state of any physical system. The principles of quantum mechanics apply universally, and their consequences, including the uncertainty principle, are believed to extend to all objects in the universe.
It is worth noting that the practical implications of the uncertainty principle become less significant as the size and mass of objects increase. Macroscopic objects, such as everyday objects or even large molecules, tend to exhibit classical behavior and can be described accurately using classical physics in many cases. However, on a fundamental level, the uncertainty principle still holds, even if its effects become negligible or undetectable for macroscopic objects under typical conditions.