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Quantum field theory


In theoretical physics, quantum field theory (QFT) is a theoretical framework for constructing ... The gravitational field and the electromagnetic field are the only two ... a non-relativistic theor...

Since magnetic field lines are just constructs the field cannot contain ...


Since magnetic field lines are just constructs the field cannot contain energy? ... Magnetic Field Lines Show Magnitude and Direction: When the lines of the ...

Magnetic Field and Magnetic Forces - UCF Physics


An object that contains Fe is not by itself magnetized, it can be attracted by either the north ... You can draw magnetic field lines just like you drew electric field lines . .... Magnetic force perpendicular to v → it cannot change the ... Bainbridge was able to construct a device that ... Potential Energy for a Magnetic Dipole: dqp. =...

Theory of electromagnetic fields


pressions for the energy density and energy flux in an electromagnetic field. ... are sufficiently complicated that solutions to Maxwell's equations cannot .... Lines of magnetic flux always occur in closed loops; lines of electric field ..... to take additional derivatives of the equations, since this allows us to construct separat...

Course Notes - MIT


1.1.2 Rubber Bands and Strings and the Forces Transmitted by Fields ............... 1- 4. 1.2 Scalar Fields . .... 1.8.4 Motion of Electric and Magnetic Field Lines .

Is the electric field real or only a theory? - ResearchGate


The electric field has energy to be able to exerts a force on another charged object. ... cardboard is in direct line between sensor and charged rod the sensor indicates no field. ... In a general dynamic case they cannot even be measured ( only the .... since what does an antenna respond to if not the electric or magnetic field .....

Superconductivity - Cengage Learning


the field of superconductivity, so it is important to understand the magnetic ... As we shall see, classical physics cannot explain the behavior and .... Since X is very small for paramagnetic and diamagnetic substances (Table ... and contains to .... substance is placed in an external magnetic field, its atomic dipoles tend to line.

Magnetic Math - NASA


Cover: Diagram of magnetic field lines of Earth modeled by Dr. Gary .... students to experience the value of math, instead of just reading about it. ..... them magnetic storms' since they caused the same gyrations of his compass needles ... The students will investigate that magnets are attracted to items that contain metals such.

Origin of magnetic fields may lie in special relativity's spacetime ...


Sep 9, 2010 ... (PhysOrg.com) -- Magnetic fields play an important role on scales ranging from ... the origin of magnetic fields, since it means that magnetic fields have helicity, ... “ For that to happen, the effective force has to be so that it cannot be ..... BTW " Space-time distortion of special relativity" is just an oxym...

Let me take you down, cos we're going to ... quantum fields | plus ...


Jul 22, 2013 ... Do you remember those pretty field lines that emerge when you scatter iron ... In the case of a simple magnet the field is static; it doesn't change with time. ... space in the form of energy being carried across the electromagnetic field. .... And since electromagnetism is all about photons you cannot ignore ....

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Electric Field Lines - The Physics Classroom


Since electric field is a vector quantity, it can be represented by a vector arrow ... Not only does the density of lines surrounding any given object reveal ... Consequently, the lines representing the field cannot cross each other at any given location in space ... But what if a region of space contains more than one point charge?

Magnetic Fields a new theory - The Physics of Bruce Harvey


A not too mathematical look at some of the properties of magnetic fields and ... Faraday, Faraday's law, magnetic flux, energy density flux, magnetic energy density flux ... have used to construct wonderful technologies are just the by products of the .... we find that we cannot measure an electric field of either from a distance.

electromagnetism - How do the electric or magnetic fields contain ...


May 29, 2014 ... So really, the only things that do have momentum are fields. ... More than that, since the existence of electromagnetic field momentum is ... or not is a matter of the definition of the word "have", which is a human construct. .... electromagnetic energy cannot be conserved globally, rather locally, which mean...