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Frequency (symbol f), most often measured in hertz (symbol: Hz), is the number of occurrences of a repeating event per unit of time. It is also occasionally...

In physics, specifically classical mechanics, the three-body problem involves taking the initial positions and velocities (or momenta) of three point masses...

Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts...

Mathematical physics refers to the development of mathematical methods for application to problems in physics. The Journal of Mathematical Physics defines...

Earth's inner core is the innermost geologic layer of the planet Earth. It is primarily a solid ball with a radius of about 1,220 km (760 mi), which is...

Peter Joseph William Debye ForMemRS (/dɛˈbaɪ/; Dutch: [dəˈbɛiə]; March 24, 1884 – November 2, 1966) was a Dutch-American physicist and physical chemist...

Cavitation in fluid mechanics and engineering normally refers to the phenomenon in which the static pressure of a liquid reduces to below the liquid's...

The history of quantum mechanics is a fundamental part of the history of modern physics. The major chapters of this history begin with the emergence of...

Steven Chu FREng ForMemRS HonFInstP (born February 28, 1948) is an American physicist and former government official. He is a Nobel laureate and was the...

In nuclear science, the decay chain refers to a series of radioactive decays of different radioactive decay products as a sequential series of transformations...

Radiation pressure (also known as light pressure) is mechanical pressure exerted upon a surface due to the exchange of momentum between the object and...

A radiation dosimeter is a device that measures dose uptake of external ionizing radiation. It is worn by the person being monitored when used as a personal...

Dark radiation (also dark electromagnetism) is a postulated type of radiation that mediates interactions of dark matter. By analogy to the way photons...

Unsolved problem in physics: What is the source of imbalance of matter and antimatter? This refers to the small non-zero value of baryons over photons...

The Drude model of electrical conduction was proposed in 1900 by Paul Drude to explain the transport properties of electrons in materials (especially metals)...

Jens Horst Gundlach (born 1961 in Würzburg) is a German physicist. His father was Gerd Gundlach, a biochemistry professor in Gießen. Jens Gundlach studied...

Einstein synchronisation (or Poincaré–Einstein synchronisation) is a convention for synchronising clocks at different places by means of signal exchanges...

The Forest fire weather index (FWI) (French: indice forêt météo, IFM) is an estimation of the risk of wildfire computed by Météo France and the Meteorological...

Edward A. Spiegel (1931 — January 2, 2020) was an American professor of astronomy at Columbia University. He worked on convection theory and on the application...

Walter C Patterson (born November 4, 1936) is a UK-based Canadian physicist and widely published writer and campaigner on energy. Patterson was born in...