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9 Topic Pages Found in Science and starting with the letter Q
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quantum electrodynamics

Quantum theory of the interactions of charged particles with the electromagnetic field . It describes the interactions of light with matter as well as

Open quantum mechanics
quantum mechanics

Branch of physics that uses the quantum theory to explain the behaviour of elementary particles . According to quantum theory, all radiant energy

Open Quantum Theory
Quantum Theory

modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory


open, or surface, excavation of rock used for various purposes, including construction, ornamentation, road building, and as an industrial raw

Open Quartz

Crystalline form of silica SiO 2 , one of the most abundant minerals of the Earth's crust (12% by volume). Quartz occurs in many different kinds of

Open quasar

( kwā'sär ), one of a class of blue celestial objects having the appearance of stars when viewed through a telescope and currently believed to be the


( kwē'lēə ), common name for an East African weaverbird , Quelea quelea. Less than 5 in. (13 cm) long and weighing slightly more than 1/2 oz (1.4

Quine, W. V. (Willard Van Orman)

American philosopher, perhaps the most influential American philosopher of the twentieth century. His books include Word and Object (1960) and Pursuit

Open Quinoa

( kēnwä' ), tall annual herb (Chenopodium quinoa) of the family Chenopodiaceae ( goosefoot family), whose seeds have provided a staple food for