quantum theory

noun

1
: a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale
2

Examples of quantum theory in a Sentence

Recent Examples on the Web
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Sean Hartnoll has been analyzing the chaotic behavior found inside black holes in the hopes of coming up with a quantum theory of gravity. Lyndie Chiou, Wired News, 20 Apr. 2025 While quantum theory seems to allow it, physicists have had difficulty finding a mathematical description of a paraparticle that works. Shalma Wegsman, Quanta Magazine, 11 Apr. 2025 The goal of quantum cosmology is to devise and apply a quantum theory of gravity to the entire universe. Edgar Shaghoulian, Scientific American, 1 Sep. 2022 Bethe had stumbled upon a perfect quantum theory, one that worked for any number of particles. Quanta Magazine, 12 Feb. 2025 See All Example Sentences for quantum theory

Word History

First Known Use

1912, in the meaning defined at sense 1

Time Traveler
The first known use of quantum theory was in 1912

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Cite this Entry

“Quantum theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantum%20theory. Accessed 1 May. 2025.

Kids Definition

quantum theory

noun
: a theory in physics based on the idea that radiant energy (as light) is composed of small separate packets of energy

Medical Definition

quantum theory

noun
: a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale

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