James Clerk Maxwell - James Clerk Maxwell James Clerk Maxwell (June 13, 1831 - November 5, 1879) was a Scottish physicist, born in Edinburgh. He was the last representative of a younger branch of the well-known Scottish family of Clerk of Penicuik. Maxwell is generally regarded as the nineteenth century scientist who had the greatest influence on twentieth century physics, making contributions to the fundamental models of nature. In 1931, on the centennial anniversary of Maxwell's birth, Einstein described Maxwell's work as the "most profound and the most fruitful that physics has experienced since the time of Newton." Algebraic mathematics with elements of geometry are a feature of much of Maxwell's work. Maxwell demonstrated that electric and magnetic forces are two complementary aspects of electromagnetism. He showed that electric and.
James Maxwell - James Maxwell James Maxwell may be: James Maxwell (actor) (1929-1995) James Clerk Maxwell, (1831-1879), physicist.
James Fitzjames Stephen - James Fitzjames Stephen Sir James Fitzjames Stephen (March 3, 1829 - 1894) was an English lawyer and judge, created 1st Baronet Stephen by Queen Victoria. Born in Kensington, London, he was the grandson of James Stephen and the brother of Sir Leslie Stephen. He was educated at Eton, and for two years at King's College, London. In October 1847 he entered Trinity College, Cambridge. Although an outstanding student, he did not win any prizes, mainly because he was uninterested in mathematics or classics, which formed the basis of the course. He was already acquainted with Sir Henry Maine, six years his senior, and then newly appointed to the chair of civil law at Cambridge. Although their temperaments were very different, their acquaintance became a strong friendship,.
Maxwell's equations - Maxwell's equations Maxwell's equations are the set of four equations by James Clerk Maxwell that describe the behavior of both the electric and magnetic fields. Table of contents showTocToggle("show","hide") 1 Introduction 2 Summary 2.1 General Case 2.2 In Linear Media/Material 2.3 In a Vacuum 3 Detail 3.4 Charge Density and the Electric Field 3.5 The Structure of the Magnetic Field 3.6 A Changing Magnetic Field and the Electric Field 3.7 The Source of the Magnetic Field 4 A Final Note on Unit Systems 5 Formulation of Maxwell's equations in special relativity 6 Maxwell's equations in terms of differential forms 7 References 8.
Maxwell's demon - Maxwell's demon In 1871, the Scottish physicist James Clerk Maxwell proposed a thought experiment. A wall separates two compartments filled with gas. A little "demon" sits by a tiny trapdoor in the wall. It looks at oncoming gas molecules, and depending on their speeds it opens or closes the trapdoor. The object of the game is to eventually collect all the molecules faster than average on one side, and the slower ones on the other side. We end up with a hot, high pressure gas on one side, and a cold, low pressure gas on the other. Conservation of energy is not violated, but we have managed to redistribute the random kinetic energy of the molecules (heat) in such a way that energy can now be.
Maxwell - Maxwell The compound derived CGS unit, the maxwell, abbreviated as Mx, is the unit for the magnetic flux. The unit was previously called a line. The unit name honors James Clerk Maxwell, who presented the unified theory of electromagnetism. 1 maxwell = 1 gauss * cm2 = 10–8 weber In a magnetic field of strength one gauss, one maxwell is the total flux across a surface of one square centimeter perpendicular to the field. Maxwell can also refer to: James Clerk Maxwell, 19th century Scottish physicist Robert Maxwell, politician and newspaper tycoon, and his controversial family The Maxwell automobile, an early 20th century brand of motor car Maxwell (musician), a Nu soul artist This is partially a disambiguation page; that is, one that just points to.
Maxwell's theorem - Maxwell's theorem In probability theory, Maxwell's theorem, named in honor of James Clerk Maxwell, states that if the probability distribution of a vector-valued random variable X = ( X1, ..., Xn )T is the same as the distribution of GX for every n×n orthogonal matrix G and the components are independent, then the components X1, ..., Xn are normally distributed with expected value 0, all have the same variance, and are independent. Since a multiplication by an orthogonal matrix is a rotation, the theorem says that if the probability distribution of a random vector is unchanged by rotations, then the components are independent, identically distributed, and normally distributed. In other words, the only rotationally invariant probability distributions on Rn are multivariate normal distributions with expected value.
Venus (planet) - minimal value of the temperature, listed in the table, refers to cloud tops - on surface the temperature is never below 400°C. Surface features Venus has slow retrograde rotation, meaning it rotates from east to west instead of west to east as all other known planets in the solar system do. It is not known for sure why Venus is different in this manner, although it may be the result of a collision with a very large asteroid at some time in the distant past. In addition to this unusual retrograde rotation, the periods of Venus's rotation and of its orbit are synchronized in such a way that it always presents the same face toward Earth when the two planets are at their closest approach (5.001 Venusian days between each inferior.
Joseph John Thomson - 1890 he married Rose Paget, and he had two children with her. One of his students was Ernest Rutherford, who would later succeed him in the post. Influenced by the work of James Clerk Maxwell, and the discovery of the X-ray, he deduced that cathode rays (see cathode ray tube) existed of negatively charged particles, which he called "corpuscles", and which are now known as electrons. The electron had been posited earlier, by G. Johnstone Stoney, as a unit of charge in electrochemistry, but Thompson realised that it was also a subatomic particle, the first one to be discovered. His discovery was made known in 1897, and caused a sensation in scientific circles, eventually resulting in his being awarded a Nobel prize (1906). Prior to the outbreak of World War I,.
Intellectual history of time - of as 'natural time', the angle of the sun on the horizon. Isochronous time was seen as a problem more than a solution, because people's lives still revolved around the light needed to see. The acceptance of isochronous time had to wait until 1879 when the light bulb was invented. But the clocks were still aligned with the rise of the sun. It took the steam enginge to completely divorce time from the sun. Invention of the locomotive in 1830, time had to be synchronized across vast distances in order to organize the train schedules. This eventually led to the development of time zones, and, of course, global isochronous time. The isochronous clock changed our lives. The all-powerful business day revolved around it - the bars close at 2:00, and appointments.
Hans Christian Orsted - any satisfactory explanation of the phenomenon, nor did he try to represent the phenomenon in a mathematical framework. In 1825 he made a significant contribution to chemistry by producing aluminum for the first time. See also: James Clerk Maxwell, physics..
Heinrich Rudolf Hertz - Dresden, Munich and Berlin. He was a student of Gustav R. Kirchhoff and Hermann von Helmholtz. He obtained his PhD in 1880, and remained a pupil of Helmholtz until 1883 when he took a post as a lecturer in theoretical physics at the University of Kiel. Following Michelson's 1881 experiment (precursor to the 1887 Michelson-Morley experiment) which disproved the existence of Luminiferous aether he rederived Maxwell's equations, to take the new discovery into account. His experiments proved that electric signals can travel through open air, as had been predicted by James Clerk Maxwell and Michael Faraday, which is the basis for the invention of radio. He died in Bonn, Germany. His nephew Gustav Ludwig Hertz was a Nobel Prize winner, and Gustav's son Carl Hellmuth Hertz invented medical ultrasonography. See also.
Hendrik Lorentz - take up teaching evening classes. He worked for his doctorate while holding the teaching post. In his doctoral thesis for University of Leiden (1875), Lorentz refined the electromagnetic theory of James Clerk Maxwell to better explain the reflection and refraction of light. He was appointed professor of mathematical physics at the Univiersity of Leiden in 1878. During his time there he was primarily interested in a single theory to explain the relationship of electricity, magnetism, and light. Lorentz theorized that the atoms might consist of charged particles and suggested that the oscillations of these charged particles were the source of light. This was experimentally proven in 1896 by Pieter Zeeman, a pupil of Lorentz. In 1895 in an attempt to explain the Michelson-Morley experiment, Lorentz introduced the concept of local time.
History of radio - radio 6 Telex on Radio 7 Exotic technologies 8 Television 9 Internet Radio (1995--) 10 Satellite Radio (2001--) 11 Ongoing development Radio's prehistory (19th century) 1820 Hans Christian Ørsted Michael Faraday James Clerk Maxwell Heinrich Rudolf Hertz Radio Communication In St. Louis, Missouri, Nikola Tesla made the first public demonstration of radio communication in 1893. Addressing the Franklin Institute in Philadelphia and the National Electric Light Association, he described and demonstrated in detail the principles of radio communication. The apparatus that he used contained all the elements that were incorporated into radio systems before the development of the vacuum tube. In 1895, Guglielmo Marconi sent a telegraph message without wires, but he didn't send voice over the airwaves; Reginald Fessenden, in 1900, accomplished that. On Christmas Eve, 1906, using his heterodyne.
George Gabriel Stokes - university, and marble busts of him by Hamo Thornycroft were formally offered to Pembroke College and to the university by Lord Kelvin. Sir George Stokes, who was made a baronet in 1889, further served his university by representing it in parliament from 1887 to 1892. During a portion of this period (1885—1890) he was president of the Royal Society, of which he had been one of the secretaries since 1854, and thus, being at the same time Lucasian professor, he united in himself three offices which had only once before been held by one man, Sir Isaac Newton, who, however, did not hold all three simultaneously. Stokes was the oldest of the trio of natural philosophers, James Clerk Maxwell and Lord Kelvin being the other two, who especially contributed to the.
Fleeming Jenkin - and sketched. At seventeen, on hearing Pasta sing in Paris, she sought out the artist and solicited lessons. Pasta, on hearing her sing, encouraged her, and recommended a teacher. She wrote novels. At forty, on losing her voice, she took to playing the piano, practising eight hours a day; and when she was over sixty she began the study of Hebrew. Their only child, Henry Charles Fleeming Jenkin, was generally called Fleeming Jenkin, after Admiral Fleeming, one of his father's patrons. He was born in a government building near Dungeness, his father at that time being in the coast-guard service. His versatility was derived from his mother, who, owing to her husband's frequent absence, had the principal share in the boy's education. She took him to the south of Scotland, where,.
Edinburgh University - amalgamating the Department of Artificial Intelligence (DAI), the Department of Computer Science (DCS), the Department of Cognitive Science (CogSci), the Artificial Intelligence Applications Institute, the Institute of Adaptive and Neural Computing and a number of other associated Institutes and computing groups. However this has posed a problem for the School as DAI already had two different buildings (George Square), CogSci had another (George Square) and DCS was housed at another site entirely (Kings Buildings), as well as having three entirely different computer networks (all based on Sun servers, though DCS had been developing the idea of Linux clients). This has lead to the adopting of LCFG (a Unix configuration system) and a joint initiative with CERN (Geneva) to create a centrally managed computer network where clients are entirely updatable from central.
Edinburgh Academy - Edinburgh, Scotland. Pupils of note include: Fleeming Jenkin, professor of engineering. James Clerk Maxwell, physicist. Archibald Campbell Tait, who became Archbishop of Canterbury. Peter Guthrie Tait, physicist. George Younger, 1st Viscount Younger of Leckie.
Electromagnetism - from the positive electric charge of the protons in atomic nuclei and the negative electric charge of the electrons surrounding the nuclei. So are the forces acting on the electrons in atoms, whose behavior gives rise to the varied phenomena observed in chemical reactions. Finally, it turns out that light can be described as a set of travelling disturbances in the electromagnetic field (i.e. electromagnetic waves), so all optical phenomena are actually electromagnetic in nature Theories of electromagnetism The theory of classical electromagnetism was developed by various physicists over the course of the 19th century, culminating in the work of James Clerk Maxwell, who unified the preceding developments into a single theory and discovered the electromagnetic nature of light. Classical electromagnetism describes the behavior of the electromagnetic field using a set.
100 Greatest Britons - Boy George and Robbie Williams. It also included two living Irish nationals (Bono and Bob Geldof) and James Connolly, the Irish nationalist who was executed by the British in 1916. The resulting series, "Great Britons", included individual programmes on the top ten, with viewers having further opportunities to vote after each programme. It concluded with a debate. The results, which are not statistically valid, are as follows: Sir Winston Churchill Isambard Kingdom Brunel Diana, Princess of Wales Charles Darwin William Shakespeare Sir Isaac Newton Elizabeth I of England John Lennon Horatio Nelson Oliver Cromwell Ernest Shackleton Captain James Cook Robert Baden-Powell King Alfred the Great Arthur Wellesley, 1st Duke of Wellington Margaret Thatcher (Baroness Thatcher) Michael Crawford Queen Victoria Sir Paul McCartney Sir Alexander Fleming Alan Turing Michael Faraday Owain Glyndwr.
