wiktionary ElectromagneticElectromagnetic may refer to Force Electromagnetism , one of four fundamental forces See also Electromagnetic field Electromagnetic force Electromagnetic radiation Electromagnetic induction Electromagnetic spectrum Electromagnetic therapy alternative medicine , use of electromagnetism in alternative medicine Electromagnetic weapon , a type of weapon Electromagnetic propulsion Electromagnetic pulse Electromagnetic levitation Electromagnetic shielding disambig ... more details
spectroscopy flames or sparks or electromagnetic radiation in the case of fluorescence ... of white light by Dispersion optics dispersing it with a prism is an example of spectroscopy. Spectroscopy ..., spectroscopy originated through the study of visible spectrum visible light dispersed according ... , spectrograph s or spectral analyzer s. Daily observations of color can be related to spectroscopy. Neon lighting is a direct application of atomic spectroscopy . Neon and other noble gases ... to generate specific colors and hues. A commonly encountered molecular spectroscopy molecular spectrum ... and Niels Bohr Niels Bohr s explanation of atomic structure and spectra. Spectroscopy is used in physical ... be used to detect, identify and quantify chemicals. Spectroscopy is also used in astronomical spectroscopy ... objects such as their temperature and velocity . Theory One of the central concepts in spectroscopy ... is high enough. Classification of methods Spectroscopy is a sufficiently broad field that many sub ... of spectroscopy are distinguished by the type of radiative energy involved in the interaction. In many .... The types of radiative energy studied include Electromagnetic radiation was the first source of energy used for spectroscopic studies. Techniques that employ electromagnetic radiation are typically classified by the wavelength region of the spectrum and include microwave spectroscopy microwave , terahertz spectroscopy terahertz , infrared spectroscopy infrared , near infrared spectroscopy near infrared , Ultraviolet visible spectroscopy visible and ultraviolet , x ray spectroscopy x ray and gamma spectroscopy gamma spectroscopy. Particles, due to their de Broglie wavelength , can also be a source of radiative energy and both electron spectroscopy electrons and neutron spectroscopy ... Acoustic spectroscopy involves radiated pressure waves. Dynamic mechanical spectroscopy Mechanical .... Nature of the interaction Types of spectroscopy can also be distinguished by the nature of the interaction ... more details
Multiple issues expert subject April 2007 orphan February 2010 context May 2009 Spectroscopy is the study of light through light matter interactions. There are three main types of interactions Quantized interactions in which involved molecule s Here atoms, full or parts of molecules or crystals,.. jump from a stationary state to another stationary state. It is the most usual spectroscopy. Coherence physics Coherent interactions in which the involved molecules are excited to a non stationary state during the interaction and return to their initial state. A detectable effect requires the coherence, that is the relations between the molecular parameters allowing the interaction oscillating dipoles... and the local electromagnetic fields are the same for all molecules. Mixed interactions coherent and involving transitions of some molecules example He Ne laser s. Except refraction which is widely used, the coherent interactions are generally studied using lasers, so that, due to the intensity physics intensity of these sources, the effects depend non linearly on the intensity of the lasers. Some interactions require an intensity threshold. See also Coherent anti Stokes Raman spectroscopy Coherent Stokes Raman spectroscopy Raman spectroscopy References Reflist DEFAULTSORT Coherent Spectroscopy Category Spectroscopy Physics stub ... more details
Electromagnetic flux may refer to one of the following Flux or flux density of electromagnetic radiation Electric flux and magnetic flux . disambig ... more details
Orphan date January 2011 Optics and Spectroscopy is scientific journal , English version of the Russian journal optika i spektroskopiya , founded in 1956. It publishes research and review papers on a monthly basis. Covers various topics of spectroscopy of electromagnetic waves from radio waves until X rays excluding, perhaps, gamma rays and acoustical waves , and related topics of optics, including quantum optics . Especially appreciate contrinuitons about spectroscopy of atoms, molecules, and condensed state, lasers and the interaction of laser radiation with matter, physical and geometrical optics, holography and physical principles of optical instrument making. although typical delay between submisison and publication is neadured with years. External links http www.maik.rssi.ru cgi perl journal.pl?name optics&page main, main page http www.maik.rssi.ru cgi perl search.pl?type contents&lang eng&name optics, access to the articles Category Optics journals Category Science and technology in Russia Category Science and technology in the Soviet Union Category Publications established in 1956 physics journal stub ... more details
Interventions infobox Name Electromagnetic therapy Image Caption ICD10 ICD10PCS 6A2 6 A 2 ICD9 MeshID D055909 OPS301 OtherCodes HCPCSlevel2 Electromagnetic therapy or Electromagnetic field therapy refers to therapy involving the use of magnet s or electromagnets . Types include Bioelectromagnetics , the study of how electromagnetic fields interact with and influence biological processes. Electrotherapy , the use of electrical or electromagnetic energy in medicine Electromagnetic therapy alternative medicine , the use of electromagnetic radiation to treat disease. Evidence of efficacy is lacking. Pulsed Electromagnetic Field Therapy , or PEMF , the use of weak electromagnetic fields to initiate osteogenesis . See also Magnet therapy , use of static magnetic field s with the aim of treating disease. Evidence of efficacy is lacking. Extracorporeal assistance, performance, and therapy medicine stub Category Medical procedures Category Electromagnetism ... more details
url http pharmaxchange.info press 2011 08 introduction to the electromagnetic spectrum and spectroscopy title Introduction to the Electromagnetic Spectrum and Spectroscopy publisher Pharmaxchange.info ...pp semi small yes File EM Spectrum Properties edit.svg thumb 330px A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths The electromagnetic spectrum is the Spectrum range of all possible frequencies of electromagnetic radiation . ref cite ... ref The electromagnetic spectrum of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. The electromagnetic spectrum extends ... of an atom . It is for this reason that the electromagnetic spectrum is highly studied for spectroscopic ... Glenn Elert url http hypertextbook.com physics electricity em spectrum title The Electromagnetic Spectrum ... Extremely low freq. Freq Frequency History For most of history, light was the only known part of the electromagnetic ... of electromagnetic waves other than light came in 1800, when William Herschel discovered infrared ... Maxwell was studying electromagnetic field and realized that they traveled at around the speed of light .... These equations predicted many frequencies of electromagnetic waves traveling at the speed of light ... portion of the electromagnetic spectrum was filled in with the discovery of gamma ray s. In 1900 ... electromagnetic waves. Range of the spectrum Electromagnetic waves are typically described by any ... url http physics.nist.gov cgi bin cuu Value?h ref Whenever electromagnetic waves exist in a Transmission medium medium with matter , their wavelength is decreased. Wavelengths of electromagnetic radiation ... also depends on the amount of energy per quantum photon it carries. Spectroscopy can detect a much ... are widely used in astrophysics . For example, many hydrogen atom s Emission electromagnetic ... B. L. ref Rationale Electromagnetic radiation interacts with matter in different ways in different parts ... more details
In telecommunication , the term electromagnetic environment EME has the following meanings For a telecommunications system , the spatial distribution of electromagnetic field s surrounding a given site. The electromagnetic environment may be expressed in terms of the spatial and temporal distribution of electric field strength volt s per metre , irradiance watt s per square metre , or energy density joule s per cubic metre . The resulting product of the Power physics power and time distribution, in various frequency ranges, of the radiated or conducted electromagnetic Emission electromagnetic radiation emission levels that may be encountered by a military force, system, or platform when performing its assigned mission in its intended operational environment. It is the sum of electromagnetic interference electromagnetic pulse hazards of electromagnetic radiation to personnel, ordnance, and volatile materials and natural phenomena effects of lightning and p static. Source FS1037C MS188 DODDIC Category Electromagnetic radiation Category Telecommunications telecomm stub pl rodowisko elektromagnetyczne ru ... more details
unreferenced date September 2008 Atomic spectroscopy is the determination of elemental composition by its Electromagnetic spectrum electromagnetic or mass spectrum . Atomic spectroscopy is closely related to other forms of spectroscopy . It can be divided by atomization source or by the type of spectroscopy used. In the latter case, the main division is between optical and mass spectrometry. Mass spectrometry generally gives significantly better analytical performance, but is also significantly more complex. This complexity translates into higher purchase costs, higher operational costs, more operator training, and a greater number of components that can potentially fail. Because optical spectroscopy is generally less expensive and has performance adequate for many tasks, it is far more common ... spectroscopy Electrons exist in energy levels within an atom. These levels have well defined ... them. In optical spectroscopy, the energy absorbed to move an electron to a more energetic level ... to measure the wavelength of light than to directly measure its energy. Optical spectroscopy can be further divided into absorption, emission, and fluorescence. In atomic absorption spectroscopy , light ... as fluorescence. fluorescence spectroscopy Atomic fluorescence spectroscopy measures this emitted ... than atomic absorption. Strictly speaking, any measurement of the emitted light is emission spectroscopy, but atomic emission spectroscopy usually does not include fluorescence and rather refers ... modifications of atomic optical spectroscopy atom sources. Ion and atom sources Sources can be adapted ... analytical performance and their versatility. For all atomic spectroscopy, a sample must ... for atomic absorption spectroscopy, most sources are used primarily for atomic emission spectroscopy ... source See also Cold vapour atomic fluorescence spectroscopy Atomic spectral line References reflist ... Category Spectroscopy bg cs Atomov absorp n spektrometrie ... more details
File Onde electromagnetique.svg thumb 400px Electromagnetic waves can be imagined as a self propagating ... other. Electromagnetism cTopic Classical electromagnetism Electrodynamics Electromagnetic radiation ... . In vacuum , electromagnetic radiation propagates at a characteristic speed, the speed of light . Electromagnetic radiation is a particular form of the more general electromagnetic field EM field that is defined as the field produced by moving charges. Electromagnetic radiation is associated with only ... when it is destroyed. The photon is the quantum of the electromagnetic interaction, and is the basic ... for producing much of the highest frequency electromagnetic radiation observed in nature. Quantum ... of its wave. The electromagnetic spectrum , in order of increasing frequency and decreasing wavelength ... thumb Shows the relative wavelengths of the electromagnetic waves of three different colors ... Clerk Maxwell first formally postulated electromagnetic waves . These were subsequently confirmed by Heinrich Hertz . Maxwell derived a Electromagnetic wave equation wave form of the electric and magnetic ... varying magnetic field causes changes over time in the electric field. In an electromagnetic wave ... form a propagating electromagnetic wave, which moves out into space and never again affects the source ... charges and currents sources in Maxwell s equations that produce a local type of electromagnetic ... for EM radiation. Instead, they cause electromagnetic field behavior that only efficiently transfers power to a receiver very close to the source, such as the electromagnetic induction magnetic induction ..., whether the signal is immediately picked up, or not. This distant part of the electromagnetic field is electromagnetic radiation also called the far field . The far fields propagate without ability ... of EM radiation File Electromagneticwave3Dfromside.gif thumb Electromagnetic waves can be imagined ... and maxima together The physics of electromagnetic radiation is electrodynamics . Electromagnetism ... more details
In telecommunication , electromagnetic survivability is the ability of a system , subsystem, or equipment to resume functioning without evidence of Degradation telecommunications degradation following temporary exposure to an adverse electromagnetic environment . The system, subsystem, or equipment performance may be degraded during exposure to the adverse electromagnetic environment, but the system will not experience permanent damage, such as electronic component component burnout, that will prevent proper operation when the adverse electromagnetic environment is removed. References FS1037C MS188 Category Telecommunications telecommunications stub ... more details
Image Spectroscopy overview.svg thumb upright 2 right An overview of electromagnetic radiation absorption ... sources are employed in order to cover the electromagnetic spectrum. For spectroscopy, it is generally ... Spectroscopy Category Electromagnetic radiation Category Astrochemistry Category Radiation ar ... Absorption spectroscopy is the first direct detection and chemical analysis of the atmosphere ... Credit A. Feild, STScI and NASA website. Absorption spectroscopy refers to spectroscopy spectroscopic techniques that measure the absorption electromagnetic radiation absorption of electromagnetic ... varies as a function of frequency, and this variation is the Absorption spectroscopy Absorption spectrum absorption spectrum . Absorption spectroscopy is performed across the electromagnetic spectrum . Absorption spectroscopy is employed as an chemical analysis analytical chemistry tool to determine ... present. Infrared spectroscopy Infrared and ultraviolet visible spectroscopy are particularly common in analytical applications. Absorption spectroscopy is also employed in studies of molecular and atomic physics, astronomical spectroscopy and remote sensing. There are a wide range of experimental ... determined ref Modern Spectroscopy Paperback by J. Michael Hollas ISBN 978 0 470 84416 8 ref ref Symmetry and Spectroscopy An Introduction to Vibrational and Electronic Spectroscopy Paperback by Daniel ... , pressure , electric field electromagnetic field . The lines will also have a spectral linewidth ... spectroscopy Rotational lines , for instance, occur when the rotational state of a molecule is changed. Rotational lines are typically found in the microwave spectral region. Vibrational spectroscopy ... found in the infrared region. Electronic spectroscopy Electronic lines correspond to a change in the electronic ... Fe.png thumb 400px font size 2 Emission spectrum of iron font Emission electromagnetic radiation Emission is a process by which a substance releases energy in the form of electromagnetic radiation ... more details
Polarization spectroscopy comprises a set of spectroscopic techniques based on polarization properties of light not necessarily visible one Ultraviolet UV , X ray , infrared , or in any other frequency range of the electromagnetic radiation . By analyzing the polarization properties of light, decisions can be made about the media that emitted the light or the media the light passes scatters through . Alternatively, a source of polarized light may be used to probe a media in this case, the changes in the light polarization comparing to the incidental one allow to infer the media properties. In general, any kind of anisotropy in the media results in some sort of light polarization. Such an anisotropy can be either inherent to the media e.g., in the case of a crystal substance , or imposed externally e.g., in the presence of magnetic field in plasma physics plasma . See also Zeeman effect Faraday effect Stark effect Plasma diagnostics References reflist physics stub Category Spectroscopy ... more details
electromagnetism cTopic Electrodynamics An electromagnetic pump is a pump that moves liquid metal or any electrically conductive liquid using electromagnetism . A magnetic field is set at right angles to the direction the liquid moves in, and a current is passed through it. This causes an electromagnetic force that moves the liquid. Applications include pumping liquid metal through a cooling system. See also Electromagnetic flow meter Molten salt References references Bibliography R. S. Baker Handbook of Electromagnetic pump technology External links http lecturedemo.ph.unimelb.edu.au Electricity Magnetism Forces fields from currents Ea 5 The Electromagnetic Pump demo http www.comsol.com papers 9352 http www.carli ea.com eng c3b.htm Category Pumps electromagnetism stub ro Pomp electromagnetic ... more details
Photoacoustic spectroscopy is the measurement of the effect of absorbed electromagnetic energy particularly of light on matter by means of acoustics acoustic detection. The discovery of the photoacoustic effect dates to 1880 when Alexander Graham Bell showed that thin discs emitted sound when exposed to a Light beam beam of sunlight that was rapidly interrupted with a rotating slotted disk. The Absorption electromagnetic radiation absorbed energy from the light is transformed into kinetic energy of the sample by energy exchange processes. This results in local heat ing and thus a pressure wave or sound. Later Bell showed that materials exposed to the non visible portions of the solar spectrum i.e., the infrared and the ultraviolet can also produce sounds. A photoacoustic spectrum of a sample can be recorded by measuring the sound at different wavelength s. This spectrum can be used to identify the absorbing components of the sample. The photoacoustic effect can be used to study solid s, liquid s and gas es. ref David W. Ball http spectroscopyonline.findanalytichem.com spectroscopy article articleDetail.jsp?id 373774 Photoacoustic SpectroscopySpectroscopy, Volume 21, Issue 9, Sep 1, 2006 ref Uses and techniques Image Photoacoustic spectroscope.svg thumb Exemplary assembly of a photoacoustic spectroscope for gas analysis Photoacoustic spectroscopy has become a powerful technique to study concentration s of gases at the part per billion or even part per trillion levels. Modern photoacoustic ... of photoacoustic spectroscopy may be the realization of fully integrated micromachined photoacoustic ..., J. Wiley & Sons, New York, 1994. External links General introduction to photoacoustic spectroscopy http www.spectroscopyeurope.com images stories ArticlePDfs PAS14 5.pdf Photoacoustic spectroscopy ... Spectroscopy MICEPAS http www.micepas.basnet.by MTEC Photoacoustics, Inc. http www.mtecpas.com Category Spectroscopy de Photoakustische Spektroskopie it Effetto fotoacustico ja pl Spektroskopia ... more details
Orphan date February 2009 Electromagnetic buoyancy EMB is a force that opposes Lorentz force EMW during electromagnetic phoresis of small particles or droplets in an aqueous medium. Though this force is still being researched, it has been clearly observed in experimental procedures. Category Electromagnetism electromagnetism stub ... more details
Image Electromagnetic oscillograph img 1647.jpg thumb An electromagnetic oscillograph is an oscillograph which measures variations of electric current by having it go through a magnetic coil. Variations in current induce momentum in the coil, which can be directly measured. The electromagnetic oscillograph was invented by William Duddell . Some models utilise a mirror which reflects a beam of light, allowing measurement of minute movements of the coil. Other were fitted with a hand, possibly fitted with a pen to record values. External links http chem.ch.huji.ac.il history duddell.html William du Bois Duddell http www.freepatentsonline.com 2466691.html Electromagnetic oscillograph Category Measuring instruments Category British inventions ... more details
An Electromagnetism electromagnetic cavity is a cavity that acts as a container for electromagnetic field s such as photon s, in effect containing their wave function inside. The size of the cavity determines the maximum photon wave length that can be trapped. Additionally, it produces quantized energy level s for trapped charged particles like electrons and protons . The earth s magnetic field in effect places the earth in an electromagnetic cavity. Physical description of electromagnetic cavities Electromagnetic cavities are represented by potential well s, also called boxes , which can be of limited or unlimited depth V sub 0 sub . Quantum mechanic boxes are described by the time independent Schr dinger equation div align center math left frac hbar 2 2m nabla 2 V mathbf r right psi mathbf r E psi mathbf r math div with the additional boundary condition s the wave function is confined to the box infinite deep potential well or approaches zero as the distance from the wall increases to infinity, thus normalisable the wave function must be continuous function continuous the derivative of the wave function must be continuous which leads to real solutions for the wave functions if the net energy of the particle is negative., i.e. if the particle is in a bound state . Applications of electromagnetic cavities Electrons which are trapped in an electromagnetic cavity are in a bound state and thus organise themselves as they do in a regular atom , thus expressing chemical like behaviour. Several researchers have proposed to develop programmable matter by varying the number of trapped electrons in those cavities. http www.wired.com wired archive 9.10 atoms.html The discrete energy levels of electromagnetic cavities are exploited to produce photons of desired frequencies and thus are essential for nano or submicrometre scale laser devices. See also Cavity resonator Crab cavity Schumann resonance Optical cavity Quantum dot Category Electromagnetism ... more details
Electromagnetic Testing ET , as a form of nondestructive testing , is the process of inducing electric current s or magnetic field s or both inside a test object and observing the electromagnetism electromagnetic response. If the test is set up properly, a defect inside the test object creates a measurable response. The term Electromagnetic Testing is often intended to mean simply Eddy Current Testing ECT . However with an expanding number of electromagnetic and magnetic test methods, Electromagnetic Testing is more often used to mean the whole class of electromagnetic test methods, of which Eddy Current Testing is just one. Common Methods of Electromagnetic Testing Eddy Current Testing ECT is used to detect near surface cracks and corrosion in metallic objects such as tubes and aircraft fuselage and structures. ECT is more commonly applied to nonferromagnetic materials, since in ferromagnetic materials the skin effect depth of penetration is relatively small. Remote field testing RFT is used for nondestructive testing NDT of steel tubes and pipes. Magnetic flux leakage Magnetic flux leakage testing MFL is also used for nondestructive testing NDT of steel tubes and pipes. At present RFT is more commonly used in small diameter tubes and MFL in larger diameter pipes over long travel distances. Wire rope testing is MFL applied to steel cables, to detect broken strands of wire. Magnetic particle inspection MT or MPI is a form of MFL where small magnetic particles in the form of a powder or liquid are sprayed on the magnetized steel test object and gather at surface breaking cracks. Alternating Current Field Measurement ACFM is similar to eddy current applied to steel. Its most ... without removing insulation. References Hugo L. Libby, Introduction to Electromagnetic Nondestructive .... 5, http www.asnt.org publications handbook third 3et.htm Electromagnetic Testing . William Lord, http www.asnt.org publications materialseval June06d.pdf Electromagnetic NDT Techniques A 40 Year ... more details
For a table of IR spectroscopy data infrared spectroscopy correlation table Infrared spectroscopy IR spectroscopy is the spectroscopy that deals with the infrared region of the electromagnetic spectrum ... spectroscopy . The names and classifications of these subregions are conventions, and are only loosely based on the relative molecular or electromagnetic properties. Theory Infrared spectroscopy exploits ... of techniques, mostly based on absorption spectroscopy . As with all spectroscopic techniques, it can ... is a Fourier transform infrared spectroscopy Fourier transform infrared FTIR spectrometer . The infrared portion of the electromagnetic spectrum is usually divided into three regions the near , mid and far ... results in an unexpected shift in energy and intensity of the bands. Practical IR spectroscopy The infrared ... gas concentrations well below ppm can be measured with a White cell spectroscopy White s cell in which ... spectroscopy the need for sample treatment is minimal. The sample, liquid or solid, is placed ... Image IR spectroscopy apparatus.svg thumbnail right 400px Schematics of a two beam absorption ... Main Fourier transform infrared spectroscopy File FTIR interferogram.svg thumb An interferogram from ... spectrum. Fourier transform infrared FTIR spectroscopy is a measurement technique that allows one ... method is more common in Ultraviolet visible spectroscopy UV Vis spectroscopy , but is less practical ... spectroscopy and its applications , by Robert White, p7 ref There are other advantages, as well as some .... Absorption bands Main Infrared Spectroscopy Correlation Table Image IR summary version 2.gif centre frame Wavenumbers listed in wavenumber cm sup 1 sup . Uses and applications Infrared spectroscopy ... total reflectance spectroscopy. Using this approach, samples are pressed against the face ... from a store of thousands of reference spectra held in storage. Infrared spectroscopy is also useful ... the observations of chemical reactions and processes quicker and more accurate. Infrared spectroscopy ... more details
Orphan date February 2009 An Electromagnetism Electromagnetic Log , sometimes called an EM Log , measures the speed of a vessel through water. It operates on the principle that when a Electrical conductor conductor such as water passes through an electromagnetic field, a voltage is created and the amount of voltage created increases as the speed of the conductor increases. The process is the EM Log creates an electromagnetic field . a voltage is induced in the water the magnitude of the voltage varies depending upon the speed of the water flow past the sensor. the EM Log measures the voltage created and translates this into the vessel s speed through water. Advantages No moving parts Disadvantages Salinity and temperature of water affects calibration Measurements affected by boundary layer, water speed slowed down close to the hull by friction External links http thenauticalsite.com NauticalNotes EchoSpdLog MyEchoSpdLog Lesson02 SpeedLogs.htm http www.yokogawa.com ydk mr marine emlog index.htm http www.agiltd.co.uk marine instrumentation agilog speed log Category Navigational equipment electronics stub nl Elektromagnetisch log ... more details
Idiopathic environmental intolerance attributed to electromagnetic fields IEI EMF is a set of claims of adverse medical symptoms purportedly caused by exposure to electromagnetic field s. ref name who Other terms for IEI EMF include electromagnetic hypersensitivity EHS , electrohypersensitivity , electro sensitivity , and electrical sensitivity ES . Although the thermal effects of electromagnetic fields on the body are established, self described sufferers of electromagnetic hypersensitivity report responding to non ionizing electromagnetic fields or electromagnetic radiation at intensities well ... have found that self described sufferers of electromagnetic hypersensitivity are unable to distinguish between exposure to real and fake electromagnetic fields, ref name RubinProvReview2005 ref name ... on electromagnetic hypersensitivity. ref http www.who.int peh emf publications reports EHS Proceedings ... to find any causal connection between electromagnetic field exposure and ill health. ref ..., M Meier, C Braun Fahrlander title Symptoms of ill health ascribed to electromagnetic field exposure ... . ref name irvine2005 Levitt proposed ties between electromagnetic fields and some of these 20th century ... Levitt first B. Blake authorlink coauthors title Electromagnetic Fields publisher Harcourt Brace ... or smells. A 1991 study by William J. Rea concluded that there is strong evidence that electromagnetic ... Yaqin Pan, Ervin Yenyves, Iehiko Sujisawa, Hideo Suyama, Nasrola Samadi, Gerald Ross title Electromagnetic ... electromagnetic hypersensitivity will usually describe different levels of susceptibility to electric field s, magnetic field s and various frequencies of electromagnetic waves including fluorescent ... Philips, Alasdair and Jean 2003 2011 . http www.emfields.org library.asp Electromagnetic hypersensitivity EHS in 8 sections ref Other surveys of electromagnetic hypersensitivity sufferers have not been ... have been attributed to electromagnetic field exposure. A minority of people who report electromagnetic ... more details
Merge from Flux density discuss Talk Electromagnetic field Merger proposal Flux density date October 2011 Electromagnetism Topic Classical electromagnetism Electrodynamics An electromagnetic field also ... objects . It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetism electromagnetic .... The way in which charges and currents interact with the electromagnetic field is described by Maxwell s equations and the Lorentz force law . From a Classical physics classical perspective, the electromagnetic ... Subatomic particle particle s. Citation needed date May 2011 Structure of the electromagnetic field The electromagnetic field may be viewed in two distinct ways a continuous structure or a discrete ..., energy is viewed as being transferred continuously through the electromagnetic field between any ... at high frequencies see ultraviolet catastrophe . Discrete structure The electromagnetic field may be thought of in a more coarse way. Experiments reveal that in some circumstances electromagnetic energy ... effect the emission of electrons from metallic surfaces subjected to electromagnetic radiation the photon ... electrons. This quantum picture of the electromagnetic field which treats it as analogous to harmonic ... field theory describing the interaction of electromagnetic radiation with charged matter. It also gives ... is modelled using quantum mechanics rather than quantum field theory . Dynamics of the electromagnetic ... thought of as two parts of a greater whole the electromagnetic field. Once this electromagnetic ... electromagnetic field, then a new net electromagnetic field will be produced. Thus, the electromagnetic ... Force Law Lorentz force law . This discussion ignores the radiation reaction force . Electromagnetic field as a feedback loop The behavior of the electromagnetic field can be resolved into four different ... due to electromagnetic field electric force same direction as electric field magnetic force perpendicular ... more details
Infobox Company name Electromagnetic Geoservices ASA logo type Public company Public ose EMGS genre foundation founder location city Trondheim location country Norway location locations area served Global key people Roar Bekker small Chief Executive Officer CEO small industry Petroleum industry Petroleum products services marine EM technology revenue operating income net income owner num employees parent divisions subsid slogan homepage http www.emgs.com emgs.com footnotes intl yes http www.emgs.com Electromagnetic Geoservices ASA ose EMGS or http www.emgs.com EMGS is a Norway Norwegian geophysics geophysical services company using proprietary marine electromagnetic EM technology to support oil and gas companies in their search for offshore hydrocarbons. EMGS pioneered marine EM technology an emerging and environmentally benign exploration method in 2002 with the first successful application and commercialization of controlled source electro magnetic surveying technology CSEM . Marine EM, or CSEM, is an emerging exploration method that uses electromagnetic energy to detect resistive bodies including hydrocarbon reservoirs beneath the seabed. The company has conducted over 600 surveys to reduce exploration risk and improve drilling success rates across the world s mature and frontier basins. The technology is used in water depths ranging from 48 to 3392 metres . EMGS technology is changing how oil and gas operators are searching for hydrocarbons in frontier and mature offshore basins. The company acquires 3D EM and marine magnetotelluric data, which are used to assess formation resistivity before drilling, and interpret and integrate this information with other geo data to aid exploration decision making. 3D EM data is routinely used for lead generation, prospect ranking and volume assessments. Main offices and research department are located in Trondheim, Norway . The company ... Category Engineering companies of Norway Category Companies based in Trondheim de Electromagnetic ... more details
Refimprove All references are from a single source commercial site ogura clutch.com date June 2011 Electromagnetic brakes also called electro mechanical brakes or EM brakes slow or stop motion using electromagnetism electromagnetic force to apply mechanical resistance friction . The original name was electro mechanical brakes but over the years the name changed to electromagnetic brakes , referring to their actuation method. Since becoming popular in the mid 20th century especially in trains and trolleys, the variety of applications and brake designs has increased dramatically, but the basic operation remains the same. Both electromagnetic brakes and eddy current brake s use electromagnetic force but electromagnetic brakes ultimately depend on friction and eddy current brakes use magnetic force directly. Applications In locomotives, a mechanical linkage transmits torque to an electromagnetic braking component. Tram s and train s use electromagnetic track brake s where the braking element ... and robotic applications also employ electromagnetic brakes. Types Single face brake Image A 3 electromagnetic brake1.gif thumb 150px right A 3 Electromagentic brake Main Friction plate electromagnetic ... members of the clutch. Single face electromagnetic brakes make up approximately 80 of all of the power applied brake applications. Power off brake Image Electromagnetic Power Off Brake.gif thumb ... magnet type A permanent magnet holding brake looks very similar to a standard power applied electromagnetic ... Electromagnetic Particle Brake.gif thumb 175px right Magnetic Particle Brake Magnetic particle brakes ... power brake Image Electromagnetic Hysteresis Power Brake.gif thumb 150px left Electomagnetic ... electromagnetic brake1.gif thumb 175px right Electromagnetic Multiple Disk Brake Multiple disk brakes ... Electromagnetic clutch References reflist DEFAULTSORT Electromagnetic Brake Category Brakes Category Vehicle braking technologies Category Rail technologies Category Electromagnetism Category Electromagnetic ... more details
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