Section: STEM · PhysicsDifficulty: Advanced
Quantum Mechanics
USUK
The physics governing behavior of matter and energy at atomic and subatomic scales.
Also: QM · quantum physics
Definition
Quantum mechanics is the fundamental theory of physics that describes the behavior of matter and energy at the smallest scales, including atoms and subatomic particles. It introduces concepts such as quantization of energy, wave functions, and the probabilistic nature of physical measurements. Quantum mechanics underlies modern technologies including semiconductors, lasers, and MRI machines.
Example
“The transistors inside a smartphone rely on quantum tunneling, where electrons pass through energy barriers that classical physics says they cannot cross, enabling the switching action that makes computing possible.”
Synonyms
- quantum physics
- quantum theory
- wave mechanics
Antonyms / Opposites
- classical mechanics
- Newtonian mechanics
Images
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Related Terms
- Wave-Particle Duality
- Heisenberg Uncertainty Principle
- Schrodinger Equation
- Quantum Entanglement