What does quantum mechanics primarily address?

Quantum mechanics primarily addresses the interactions of matter on very small scales, specifically at the level of atoms and subatomic particles. This branch of physics is crucial for understanding phenomena that cannot be explained by classical mechanics, which typically deals with larger, macroscopic systems. In quantum mechanics, the behavior of particles is described using probabilities rather than deterministic laws, leading to concepts such as wave-particle duality, quantization of energy, and the uncertainty principle.

The study of these interactions allows scientists to explain a variety of phenomena, including atomic and molecular structure, chemical reactions, and the fundamental nature of light and matter. This framework is essential for advancements in technologies like semiconductors, lasers, and quantum computing, all of which rely on the principles of quantum mechanics to operate.

The focus on small-scale interactions distinguishes quantum mechanics from other areas of physics that deal with larger systems or traditional classical mechanics.