60 relations: Accretion disk, American Physical Society, Arthur Compton, Astrophysics, BKS theory, Black hole, Classical electromagnetism, Coherence (physics), Compton edge, Compton Gamma Ray Observatory, Compton wavelength, Conservation of energy, Corona, Cosmic microwave background, Density functional theory, Dot product, Electric charge, Electromagnetic radiation, Electron, Electron rest mass, Electronic anticoincidence, Energy, Energy–momentum relation, Galaxy cluster, Gamma ray, Gamma spectroscopy, Hans Geiger, Inelastic scattering, Julian Schwinger, Klein–Nishina formula, Light, Momentum, Nobel Prize in Physics, Outline of astronomy, Outline of physics, Oxford University Press, Pair production, Peter Debye, Photoelectric effect, Photon, Physical Review, Physical Review Letters, Planck constant, Prentice Hall, Radiation therapy, Radiobiology, Recoil, Special relativity, Speed of light, SQUID, ..., Sunyaev–Zel'dovich effect, Thomson scattering, Walther Bothe, Washington University in St. Louis, Wave, Wave function, Wavelength, Wu Youxun, X-ray, X-ray astronomy. Expand index (10 more) » « Shrink index
An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body.
The American Physical Society (APS) is the world's second largest organization of physicists.
Arthur Holly Compton (September 10, 1892 – March 15, 1962) was an American physicist who won the Nobel Prize in Physics in 1927 for his 1923 discovery of the Compton effect, which demonstrated the particle nature of electromagnetic radiation.
Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space".
The Bohr-Kramers-Slater (BKS) theory was perhaps the final attempt at understanding the interaction of matter and electromagnetic radiation on the basis of the so-called old quantum theory, in which quantum phenomena are treated by imposing quantum restrictions on classically describable behaviour.
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
Classical electromagnetism or classical electrodynamics is a branch of theoretical physics that studies the interactions between electric charges and currents using an extension of the classical Newtonian model.
In physics, two wave sources are perfectly coherent if they have a constant phase difference and the same frequency, and the same waveform.
In spectrophotometry, the Compton edge is a feature of the spectrograph that results from the Compton scattering in the scintillator or detector.
The Compton Gamma Ray Observatory (CGRO) was a space observatory detecting photons with energies from 20 keV to 30 GeV, in Earth orbit from 1991 to 2000.
The Compton wavelength is a quantum mechanical property of a particle.
In physics, the law of conservation of energy states that the total energy of an isolated system remains constant, it is said to be ''conserved'' over time.
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.
Density functional theory (DFT) is a computational quantum mechanical modelling method used in physics, chemistry and materials science to investigate the electronic structure (principally the ground state) of many-body systems, in particular atoms, molecules, and the condensed phases.
In mathematics, the dot product or scalar productThe term scalar product is often also used more generally to mean a symmetric bilinear form, for example for a pseudo-Euclidean space.
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
The electron rest mass (symbol) is the mass of a stationary electron.
Electronic anticoincidence is a method (and its associated hardware) widely used to suppress unwanted, "background" events in high energy physics, experimental particle physics, gamma-ray spectroscopy, gamma-ray astronomy, experimental nuclear physics, and related fields.
In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.
In physics, the energy–momentum relation, or relativistic dispersion relation, is the relativistic equation relating any object's rest (intrinsic) mass, total energy, and momentum: holds for a system, such as a particle or macroscopic body, having intrinsic rest mass, total energy, and a momentum of magnitude, where the constant is the speed of light, assuming the special relativity case of flat spacetime.
A galaxy cluster, or cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity with typical masses ranging from 1014–1015 solar masses.
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, in such as the nuclear industry, geochemical investigation, and astrophysics.
Johannes Wilhelm "Hans" Geiger (30 September 1882 – 24 September 1945) was a German physicist.
In chemistry, nuclear physics, and particle physics, inelastic scattering is a fundamental scattering process in which the kinetic energy of an incident particle is not conserved (in contrast to elastic scattering).
Julian Seymour Schwinger (February 12, 1918 – July 16, 1994) was a Nobel Prize winning American theoretical physicist.
The Klein–Nishina formula gives the differential cross section of photons scattered from a single free electron in lowest order of quantum electrodynamics.
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.
In Newtonian mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta) is the product of the mass and velocity of an object.
The Nobel Prize in Physics (Nobelpriset i fysik) is a yearly award given by the Royal Swedish Academy of Sciences for those who conferred the most outstanding contributions for mankind in the field of physics.
The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).
The following outline is provided as an overview of and topical guide to physics: Physics – natural science that involves the study of matterRichard Feynman begins his ''Lectures'' with the atomic hypothesis, as his most compact statement of all scientific knowledge: "If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations..., what statement would contain the most information in the fewest words? I believe it is...
Oxford University Press (OUP) is the largest university press in the world, and the second oldest after Cambridge University Press.
Pair production is the creation of an elementary particle and its antiparticle from a neutral boson.
Peter Joseph William Debye (March 24, 1884 – November 2, 1966) was a Dutch-American physicist and physical chemist, and Nobel laureate in Chemistry.
The photoelectric effect is the emission of electrons or other free carriers when light shines on a material.
The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).
Physical Review is an American peer-reviewed scientific journal established in 1893 by Edward Nichols.
Physical Review Letters (PRL), established in 1958, is a peer-reviewed, scientific journal that is published 52 times per year by the American Physical Society.
The Planck constant (denoted, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.
Prentice Hall is a major educational publisher owned by Pearson plc.
Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is therapy using ionizing radiation, generally as part of cancer treatment to control or kill malignant cells and normally delivered by a linear accelerator.
Radiobiology (also known as radiation biology) is a field of clinical and basic medical sciences that involves the study of the action of ionizing radiation on living things, especially health effects of radiation.
Recoil (often called knockback, kickback or simply kick) is the backward movement of a gun when it is discharged.
In physics, special relativity (SR, also known as the special theory of relativity or STR) is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time.
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
A SQUID (for superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely subtle magnetic fields, based on superconducting loops containing Josephson junctions.
The Sunyaev–Zel'dovich effect (named after Rashid Sunyaev and Yakov B. Zel'dovich and often abbreviated as the SZ effect) is the distortion of the cosmic microwave background radiation (CMB) through inverse Compton scattering by high energy electrons in galaxy clusters, in which the low energy CMB photons receive an average energy boost during collision with the high energy cluster electrons.
Thomson scattering is the elastic scattering of electromagnetic radiation by a free charged particle, as described by classical electromagnetism.
Walther Wilhelm Georg Bothe (8 January 1891 – 8 February 1957) was a German nuclear physicist, who shared the Nobel Prize in Physics in 1954 with Max Born.
Washington University in St.
In physics, a wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport.
A wave function in quantum physics is a mathematical description of the quantum state of an isolated quantum system.
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
Wu Youxun or Y. H. Woo (26 February 1897 – 30 November 1977) was a physical scientist.
X-rays make up X-radiation, a form of electromagnetic radiation.
X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.
Compton Effect, Compton Scattering, Compton Shift, Compton current, Compton effect, Compton electron, Compton interaction, Compton scatter, Compton shift, Compton shifts, Compton's effect, Compton's scattering, Comptonization, Inverse Compton Effect, Inverse Compton effect, Inverse Compton emission, Inverse Compton scattering, Inverse compton scattering.