quantum theory
Definition
Noun: A fundamental theory in physics that describes the behavior of matter and energy at the smallest scales of atoms and subatomic particles. Its core principle is that certain physical properties, such as energy, are not continuous but exist in discrete, indivisible packets called "quanta."
Usage
Quantum theory is used to discuss the foundational framework of modern physics that departs from classical mechanics. - Quantum theory revolutionized our understanding of the atomic world. - The development of quantum theory began in the early 20th century. - Understanding quantum theory is essential for fields like chemistry and electronics.
Advanced Usage
- "the quantum theory of...": Used to specify the application of quantum principles to a particular system or phenomenon.
- The quantum theory of light explains the photoelectric effect.
Variants and Related Words
- Quantum mechanics: Often used interchangeably with "quantum theory," though it can more specifically refer to the mathematical framework and laws.
- Quantum physics: A broad term encompassing both quantum theory and its applications.
- Quantum: (Noun/Adjective) Referring to a discrete quantity or packet of energy, or relating to quantum theory.
- A quantum of light is called a photon.
Synonyms
- Quantum mechanics
- Quantum physics
Related Phrases
- Copenhagen interpretation: A major interpretation of quantum theory concerning the role of measurement.
- Quantum leap: (Idiom) A sudden, large, or radical change or advance. This common idiom originates from the theory's concept of an electron making an instantaneous "jump" between energy levels.
- The new software represents a quantum leap in data processing.
Noun
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(physics) a physical theory that certain properties occur only in discrete amounts (quanta)
