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# Topic: Permittivity of free space

###### In the News (Wed 5 Mar 14)

 Free space - Wikipedia, the free encyclopedia Free space is considered the baseline state of the electromagnetic field. According to relativity, radiant energy in free space propagates at the speed of light, independent of the speed of the observer or of the source of the waves. Free space conveys that the region is absolutely devoid of matter and has no external fields or forces other than those considered in the problem at hand. en.wikipedia.org /wiki/Free_space   (360 words)

 Permittivity - Wikipedia, the free encyclopedia Permittivity is a physical quantity that describes how an electric field affects and is affected by a dielectric medium, and is determined by the ability of a material to polarize in response to the field, and thereby reduce the field inside the material. In SI units, permittivity is measured in farads per metre (F/m). The complex permittivity is usually a complicated function of frequency ω, since it is a sumperimposed description of dispersion phenomena occurring at multiple frequencies. en.wikipedia.org /wiki/Permittivity   (1815 words)

 Physical Implications of Flowing Space I propose that space is a hitherto unknown substance, the substrate of all physical phenomena. Space is that which resists the acceleration of matter; that which transmits light at c; that which resists the luminal velocity of matter; that which mediates gravity; and that which produces and sustains subatomic particles and mediates all their interactions. The free electron is not a point particle, it is as large as its sphere of EM influence in the space. www.geocities.com /hlindner1/Writings/Implicate/Implications.htm   (8077 words)

 Permitivity of Free Space - Advanced Physics Forums Permittivity of free space is measured in Farads per meter, permeability of free space is measured in Henrys per meter. Determining the value of *c* purely from the electromagnetic properties of free space was the crowning achievement of James Clerk Maxwell. Obviously it is not free space, but even an \'inert\' gas such as helium has a refractive index, which means that mu and/or epsilon are changed by the presence of matter. www.advancedphysics.org /forum/showthread.php?t=991   (831 words)

 TCAEP.co.uk :: Science-Constants-Electric Constant Permittivity of free space TCAEP.co.uk :: Science-Constants-Electric Constant Permittivity of free space Permittivity in a general medium is defined from D = ε E + P where D is the electric flux density, E is the electric field strength, and P the polarization of the medium.The permittivity of free space is known exactly and defined from www.scenta.co.uk /tcaep/nonxml/science/constant/print/pelectriccontpermittivity.htm   (82 words)

 Permittivity and Permeability of Free Space Permittivity of a vacuum is a number arrived at beginning with a value for the speed of light in the vacuum and the permeability of the vacuum. Though most discussions I've encountered on the topic tend to give permittivity and permeability of free space very little discussion, I have always been inclined to believe these concepts are of essential relevance in correctly understanding Nature at a fundamental level. If we include the permittivity of free space in a new expression for charge such as in: C/e0^1/2 then it follows that we are now dealing with only 1 unit (which it should be in my view) instead of 2. www.physicsforums.com /showthread.php?p=1002695#post1002695   (1596 words)

 Permitivity and Permeability Materials in which this does not happen have the permittivity of free space. In a material that ends up with a total field half that of the original field has a twice the permittivity of free space. Permeability, however, is seldom shifted from that of free space by more than 0.10%. www.newton.dep.anl.gov /askasci/phy05/phy05019.htm   (634 words)

 [No title] The "permittivity of free space" is a universal physical constant, like the speed of light or the gravitational constant. This theory was developed at a time when the structure of matter was not yet understood, and so "free space" was considered a material just like any other. In vacuum there is no polarization, and the permittivity of vacuum is simply a universal constant whose name says more about the history of electrostatics than about the quantity itself. amber.scripps.edu /0Net/electrostatics   (270 words)

 Permittivity - HvWiki This is very close to the permittivity of air. The permittivity of a material is generally written as a dielectric constant. This compares it to the permittivity of the vacuum (or "free space") so a dielectric constant of 20 would mean a permittivity of wiki.4hv.org /index.php/Permittivity   (100 words)

 Dynamic Space of the Aether   (Site not responding. Last check: 2007-10-30) Coulomb's constant and the gravitational constant represent the amount of force dynamic space exerts on charge and mass. The mechanical to electromagnetic ratio of a quantum space is always exactly the same. Coulomb's constant can further be mathematically represented by the speed of light in free space, permeability of free space, permittivity of free space, and the conductance of free space. www.16pi2.com /dynamic_space.htm   (506 words)

 [No title] If all of the region of interest is filled by a uniform dielectric, it is clear from the foregoing that all equations developed for fields in free space are now valid in the presence of the uniform dielectric. and E were determined in a region of free space bounded by equipotentials, that region could just as well be filled with a uniform dielectric, and for the same potentials the electric field intensity would be unaltered. Shown next is the field distribution in the limit where the permittivity between the capacitor plates (to the left) is very large compared to that outside. web.mit.edu /6.013_book/www/chapter6/6.6.html   (2666 words)

 Section 3.2. Electromagnetic calculations and simulations   (Site not responding. Last check: 2007-10-30) Thus, a dielectric constant of 52 would mean the permittivity of the tissue is 52 times that of free space at the frequency of interest. Since the permittivity of the dielectric is always greater than that of free space, the electric field is decreased by the dielectric constant. Since human tissue is normally relatively free of magnetic materials, the permeability for all simulations was set to the permeability of free space. speech.llnl.gov /thesis/3_2.htm   (3734 words)

 The history of the vacuum permittivity and permeability   (Site not responding. Last check: 2007-10-30) of the permeability of free space, aka the vacuum permeability or the >>space, aka the vacuum permittivity or the electric constant, and the >>measurement of the permeability of free space, aka the vacuum bbs.extropy.org /index.php?board=67;action=display;threadid=56756   (1054 words)

 22.9 Electromagnetic Characteristics   (Site not responding. Last check: 2007-10-30) describe the electrical and magnetic characteristics of a vacuum&endash;or free space. These words, "permittivity" and "permeability", sound strange because they are new to you. is the electric characteristic of free space" and "µ www.ux1.eiu.edu /~cfadd/1160/Ch22AC/EM4.html   (95 words)

 Permittivity   (Site not responding. Last check: 2007-10-30) The permittivity of a substance is a characteristic which describes how it affects any electric field set up in it. We can increase the capacitance of a capacitor by increasing the permittivity of the dielectric material. The permittivity of a material is usually given relative to that of free space, it is known as relative permittivity schools.matter.org.uk /SchoolsGlossary/permittivity.html   (82 words)

 DoITPoMS TLP - Introduction to Anisotropy - Dielectric permittivity   (Site not responding. Last check: 2007-10-30) is the permittivity of free space, and e is the relative dielectric permittivity (a scalar constant in this case). Often the occurrence of highly anisotropic dielectric permittivity is associated with ferroelecticity (spontaneous polarisation reversible by an electric field) and pyroelecticity (temperature dependent generation of polarisation). The refractive index, n, is given by the square root of the relative dielectric permittivity, i.e. www.doitpoms.ac.uk /tlplib/anisotropy/dielectric.php   (433 words)

 Maxwell's Equations The permittivity of free space is referred to as ε (approximately 8.854 pF/m) is the permittivity of free space. , relating the speed of light c to the permittivity and permeability of free space, was the first confirmation that light was electromagnetic radiation. www.rare-earth-magnets.com /magnet_university/maxwells_equations.htm   (930 words)

 Permittivity - Search Results - MSN Encarta Permittivity, the property of a material that determines the strength of the electric field produced by a distribution of electric charges. Dielectric properties are measured by relative permittivity (dielectric constant), which is related to the static charge on the surface when an... is the permittivity of free space, and ε uk.encarta.msn.com /Permittivity.html   (121 words)

 Electrostatics and the `Generalized Born' Solvent Model The electrostatic potential at a given point in space is the potential energy per unit charge that a test charge would have if positioned at that point in the electric field Similarly, the electric field at a given point in space is the force per unit charge that would act on a test charge located at that point. The energy of the charge distribution arising from this second term (the reaction potential) gives the electrostatic contribution to the solvation free energy. cmm.info.nih.gov /intro_simulation/node8.html   (960 words)

 Glossary of remote sensing terms E In this way, permittivity is analogous to conductivity in a resistor. is the relative permittivity or “dielectric constant” of the medium. The permittivity of free space is a constant equal to www.ccrs.nrcan.gc.ca /glossary/index_e.php?id=2815   (130 words)

 Electric field One is the speed of light c, and the other two are the electric permittivity of free space The magnetic permeability of free space is taken to have the exact value In the case of a polarizable medium, called a dielectric, the comparison is stated as a relative permittivity or a dielectric constant. hyperphysics.phy-astr.gsu.edu /hbase/electric/elefie.html   (223 words)

 The Speed of EMW and Akel's Loop , where ε is the permittivity and µ is the permeability of the medium. In free space, the permeability and permittivity of free space is used and in other medium the refractive indices are used which are also based on the permeability and permittivity of the medium in question. It turned out that it depends not only on the permeability and permittivity, but also on the conductivity and the frequency of the signal in question. www.akels-loop.com   (355 words)

 Re: What is electric permittivity of free space and how is it calculated? The electrical permittivity of free space uses the symbol of the Greek letter epsilon, with a small subset 0. Anytime you have two conductors, or electrodes, separated by an insulator or dielectric, you have a capacitor. If we build this free space capacitor, and know the area of the electrodes, and the distance between the electrodes, and then measure the capacitance - we can calculate the permittivity of free space. www.madsci.org /posts/archives/mar98/889017173.Ph.r.html   (370 words)

 What is the significance of permittivity of free space? The coefficient that we need to make it come out right is related to the permittivity of free space. The words probably go back to the days when we thought there was an ether in space. You can also think about it as the way space effects the forces between two charges. www.newton.dep.anl.gov /newton/askasci/1993/physics/PHY48.HTM   (175 words)

 Gravitation Affected by High-Voltage E-fields and Subquantum Fluctuations Since we know that electric fields of rapid rise time and high voltage can curve space dramatically, and since we know that the same can be said of high dv/dt currents involved in creating magnetic fields, and since we know from relativity theory that gravitational field can also cause such curvatures... Permeability and permittivity of free space can be altered by way of the quantum potential. I think that there may be some hyperdimensionality involved in magnetic fields, related to the vortexial flux of aetheric particles which vortex is identically the magnetic field, where the aether particles themselves may be possessed of, perhaps various, hyperdimensional characteristics. www.rialian.com /rnboyd/e-fields.htm   (1353 words)

 Dielectric Constant is the permittivity of free space, A is the area of the conducting plates and d is the distance between the two plates. By storing charges, capacitors have found applications in memory storage devices where the stored charges can represent digital "ones" and "zeros." Problems arise because of the switching times of a capacitor to charge and discharge this stored charge. Thus the dielectric constant, or relative permittivity, is the ratio of the permittivity of the material to the permittivity of free space. www.mse.vt.edu /faculty/hendricks/mse4206/projects97/group01/solidstate/dielect.htm   (450 words)

 permittivity of free space - a definition from Whatis.com permittivity of free space - a definition from Whatis.com The permittivity of free space (a vacuum) is a physical constant equal to approximately 8.85 x 10 represents the permittivity of a particular substance (also specified in farads per meter), then the relative permittivity, also called the dielectric constant whatis.techtarget.com /definition/0,,sid9_gci840798,00.html   (166 words)

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