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Edwin Power
__FORCETOC__ Edwin Albert Power (12 February 1928 – 31 January 2004) was an English physicist and an emeritus professor of applied mathematics at University College London. He made several contributions to the field of non-relativistic quantum electrodynamics. Life Power was born in Honiton, England on 12 February 1928. He obtained his B.Sc and M.Sc in mathematics from University College London in 1948 and 1949 respectively. He obtained his Ph.D under the supervision of John Currie Gunn at the University of Glasgow, for which he obtained the Kelvin Prize in 1951 (the prize recognizes the best physics thesis of the year). His doctoral work concerned meson production from proton–proton collisions. After his Ph.D, he worked at University College, where became professor of applied mathematics in 1967, and fellow in 1991. In 1953, he became a Commonwealth Fund Fellow. He then spent two years in the United States, one at Cornell University, one at Princeton University. While at P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honiton
Honiton ( or ) is a market town and civil parish in East Devon, situated close to the River Otter, north east of Exeter in the county of Devon. Honiton has a population estimated at 11,822 (based on mid-year estimates for the two Honiton Wards in 2009). History The town grew along the line of the Fosse Way, the ancient Roman road linking Exeter ( Isca Dumnoniorum) to Lincoln (Lindum). Contrary to 19th-century theories, it is unlikely to have been known as a stopping-point by the Romans, who built a small fort for that purpose just to the west of the present town. Honiton's location is mentioned in the Domesday Book as Honetone, meaning Huna's tun or farmstead. Lace-making Honiton later grew to become an important market town, known for lace making that was introduced by Flemish immigrants in the Elizabethan era. In the 17th century thousands of people produced lace by hand in their homes, and in the 19th century Queen Victoria had her wedding dress made of Honiton lace, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commonwealth Fund Fellow
The Harkness Fellowship (previously known as the Commonwealth Fund Fellowship) is a program run by the Commonwealth Fund of New York City. This fellowship was established to reciprocate the Rhodes Scholarships and enable Fellows from several countries to spend time studying in the United States. Recipients of the scholarship include a president of the International Court of Justice; former Chairman and CEO of Salomon Brothers; a former Vice-Chancellor of the University of Cambridge; the controller of BBC Radio 4; the editor of the ''Sunday Times''; former directors of the Medical Research Council, the London School of Economics and the General Medical Council; and a vice president of Microsoft. History The Commonwealth Fund is a philanthropic foundation established in the United States by Anna Harkness in 1918. Her son, Edward Stephen Harkness, initiated the Commonwealth Fund Fellowships in 1925. These were intended to reciprocate the Rhodes Scholarships by enabling British ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Physicists
English usually refers to: * English language * English people English may also refer to: Peoples, culture, and language * ''English'', an adjective for something of, from, or related to England ** English national identity, an identity and common culture ** English language in England, a variant of the English language spoken in England * English languages (other) * English studies, the study of English language and literature * ''English'', an Amish term for non-Amish, regardless of ethnicity Individuals * English (surname), a list of notable people with the surname ''English'' * People with the given name ** English McConnell (1882–1928), Irish footballer ** English Fisher (1928–2011), American boxing coach ** English Gardner (b. 1992), American track and field sprinter Places United States * English, Indiana, a town * English, Kentucky, an unincorporated community * English, Brazoria County, Texas, an unincorporated community * Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Physics
Molecular physics is the study of the physical properties of molecules and molecular dynamics. The field overlaps significantly with physical chemistry, chemical physics, and quantum chemistry. It is often considered as a sub-field of atomic, molecular, and optical physics. Research groups studying molecular physics are typically designated as one of these other fields. Molecular physics addresses phenomena due to both molecular structure and individual atomic processes within molecules. Like atomic physics, it relies on a combination of classical and quantum mechanics to describe interactions between electromagnetic radiation and matter. Experiments in the field often rely heavily on techniques borrowed from atomic physics, such as spectroscopy and scattering. Molecular Structure In a molecule, both the electrons and nuclei experience similar-scale forces from the Coulomb interaction. However, the nuclei remain at nearly fixed locations in the molecule while the electrons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philosophical Transactions Of The Royal Society A
''Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences'' is a fortnightly peer-reviewed scientific journal published by the Royal Society. It publishes original research and review content in a wide range of physical scientific disciplines. Articles can be accessed online a few months prior to the printed journal. All articles become freely accessible two years after their publication date. The current editor-in-chief is John Dainton. Overview ''Philosophical Transactions of the Royal Society A'' publishes themed journal issues on topics of current scientific importance and general interest within the physical, mathematical and engineering sciences, edited by leading authorities and comprising original research, reviews and opinions from prominent researchers. Past issue titles include "Supercritical fluids - green solvents for green chemistry?", "Tsunamis: Bridging science, engineering and society", "Spatial transformations: from f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philosophical Transactions Of The Royal Society Of London A
''Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences'' is a fortnightly peer-reviewed scientific journal published by the Royal Society. It publishes original research and review content in a wide range of physical scientific disciplines. Articles can be accessed online a few months prior to the printed journal. All articles become freely accessible two years after their publication date. The current editor-in-chief is John Dainton. Overview ''Philosophical Transactions of the Royal Society A'' publishes themed journal issues on topics of current scientific importance and general interest within the physical, mathematical and engineering sciences, edited by leading authorities and comprising original research, reviews and opinions from prominent researchers. Past issue titles include "Supercritical fluids - green solvents for green chemistry?", "Tsunamis: Bridging science, engineering and society", "Spatial transformations: fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamb Shift
In physics, the Lamb shift, named after Willis Lamb, is a difference in energy between two energy levels 2''S''1/2 and 2''P''1/2 (in term symbol notation) of the hydrogen atom which was not predicted by the Dirac equation, according to which these states should have the same energy. Interaction between vacuum energy fluctuations and the hydrogen electron in these different orbitals is the cause of the Lamb shift, as was shown subsequent to its discovery. The Lamb shift has since played a significant role through vacuum energy fluctuations in theoretical prediction of Hawking radiation from black holes. This effect was first measured in 1947 in the Lamb–Retherford experiment on the hydrogen microwave spectrum and this measurement provided the stimulus for renormalization theory to handle the divergences. It was the harbinger of modern quantum electrodynamics developed by Julian Schwinger, Richard Feynman, Ernst Stueckelberg, Sin-Itiro Tomonaga and Freeman Dyson. Lamb won t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectral Line
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules. These "fingerprints" can be compared to the previously collected ones of atoms and molecules, and are thus used to identify the atomic and molecular components of stars and planets, which would otherwise be impossible. Types of line spectra Spectral lines are the result of interaction between a quantum system (usually atoms, but sometimes molecules or atomic nuclei) and a single photon. When a photon has about the right amount of energy (which is connected to its frequency) to allow a change in the energy state of the system (in the case of an atom this is usually an electron changing orbitals), the photon is absorbed. Then the energy will be spontaneously re-emitted, either as one photon at the same frequenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coulomb Gauge
In the physics of gauge theories, gauge fixing (also called choosing a gauge) denotes a mathematical procedure for coping with redundant degrees of freedom in field variables. By definition, a gauge theory represents each physically distinct configuration of the system as an equivalence class of detailed local field configurations. Any two detailed configurations in the same equivalence class are related by a gauge transformation, equivalent to a shear along unphysical axes in configuration space. Most of the quantitative physical predictions of a gauge theory can only be obtained under a coherent prescription for suppressing or ignoring these unphysical degrees of freedom. Although the unphysical axes in the space of detailed configurations are a fundamental property of the physical model, there is no special set of directions "perpendicular" to them. Hence there is an enormous amount of freedom involved in taking a "cross section" representing each physical configuration by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigurd Zienau
Sigurd Zienau (1921–1976) was a physicist notable for the theory of the polaron. Education His undergraduate studies were in mathematics at Birkbeck College. His further studies in physics were very much in the 'old school' European style at the time and he variously studied under Walter Heitler, Wolfgang Pauli, and Herbert Fröhlich. Career In 1954, he became an ICI Fellow and lecturer at the University of Liverpool. Then in 1965, he became a Reader in Physics at University College London until his early death at the age of 55. As well as his work on polarons he is remembered for his insightful revisions of Walter Heitler's book ''Quantum Theory of Radiation'' and Nevill Francis Mott & Harrie Massey's book ''The Theory of Atomic Collisions.'' See also * Polaron * Edwin Power * Walter Heitler Walter Heinrich Heitler (; 2 January 1904 – 15 November 1981) was a German physicist who made contributions to quantum electrodynamics and quantum field theory. He brought che ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reviews Of Modern Physics
''Reviews of Modern Physics'' (abbreviated RMP) is a quarterly peer-reviewed scientific journal published by the American Physical Society. It was established in 1929 and the current editor-in-chief is Michael Thoennessen. The journal publishes review articles, usually by established researchers, on all aspects of physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ... and related fields. The reviews are usually accessible to non-specialists and serve as introductory material to graduate students, which survey recent work, discuss key problems to be solved and provide perspectives toward the end. References External links * Publications established in 1929 Physics review journals Quarterly journals English-language journals American Physical Society academic journ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
