radiation
In a general sense: Collective name for all phenomena in which energy is transported through space in the form of waves or particles. In a more restricted sense, the word is often used synonymously with electromagnetic radiation. ...
radar
Abbreviation for "radio detection and ranging" - how to detect objects, and measure their distance, by means of sending out radio waves and detecting their reflection. Widely used in air and sea traffic; for general relativity, radar is of interest as radar ...
quasar
Class of active galactic nuclei. First noticed by radio astronomers as exceedingly bright radio sources that, in the night sky, did not appear more extended than ordinary stars - thus their name, a contractino of quasi-stellar radio ...
quark
Elementary particle that is subject to the strong interaction. Quarks come in six species: up, down, strange, charme, bottom and top (with the last two sometimes called beauty and truth). Quarks are the constituents of protons and neutrons, and thus the ...
quark-gluon-plasma
An exotic form of matter which was in all probability present in the early universe shortly after the big bang. Under ordinary circumstances, quarks only occur inside larger particles, such as protons or neutrons, tightly bound together as they are by the ...
quantum theory
The framework for formulating the physical laws that govern the world at microscopic length-scales - the physics of the micro-world, for instance of atoms, atomic nuclei or elementary particles, but also the physics of ultra-precise measurements ...
quantum physics
Quantum physics comprises all theories, models, experiments and applications that are based on the laws of quantum
quantum particles
In classical physics, one can picture particles as little clumps of matter. At every time, such a clump has a definite location in space. In quantum theory, on the other hand, (quantum) particles are much more elusive. Their most complete description involves ...
