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Related Concept Videos

Electromagnetic Fields01:30

Electromagnetic Fields

Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of Gauss's...
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
Electromagnetic Wave Equation01:24

Electromagnetic Wave Equation

Maxwell's equations for electromagnetic fields are related to source charges, either static or moving. These fields act on a test charge, whose trajectory can thus be determined using suitable boundary conditions. The objective of electromagnetism is thus theoretically complete.
However, although electric and magnetic fields were first introduced as mathematical constructs to simplify the description of mutual forces between charges, a natural question emerges from Maxwell's equations: What...
Applications of EMF Measurements01:26

Applications of EMF Measurements

Electromotive force (EMF) measurements have a broad range of applications in various fields, including chemistry and physics. The electrochemical series, an arrangement of elements in order of their standard electrode potentials, can be determined through EMF measurements. Elements with lower standard potentials can reduce ions of elements with higher standard potentials.The standard cell potential, E°, allows for the calculation of the standard reaction Gibbs energy, ΔG°, and the equilibrium...
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...

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Related Experiment Video

Updated: Jun 23, 2026

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
09:57

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

Published on: September 20, 2024

Self-imaging of electromagnetic fields.

J Tervo, J P Turunen

    Optics Express
    |May 9, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Electromagnetic fields exhibit unique self-imaging properties, unlike scalar fields. Key differences include imaging at half the distance and distinct self-imaging behaviors for electric and magnetic energy densities.

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    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
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    Published on: July 27, 2018

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    Last Updated: Jun 23, 2026

    Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
    09:57

    Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

    Published on: September 20, 2024

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
    06:53

    Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

    Published on: July 27, 2018

    Area of Science:

    • Optics and Electromagnetism
    • Wave Phenomena

    Background:

    • Scalar diffraction theory describes self-imaging but omits electromagnetic field details.
    • Classical self-imaging phenomena are well-established for scalar fields.

    Purpose of the Study:

    • To explore the electromagnetic theory of self-imaging fields.
    • To identify and present features unique to electromagnetic self-imaging.
    • To provide a theoretical framework for understanding electromagnetic field self-imaging.

    Main Methods:

    • Analysis of the electromagnetic theory of self-imaging.
    • Comparison with the scalar theory of self-imaging.
    • Derivation of general expressions for TE and TM polarized fields using angular spectrum decomposition.

    Main Results:

    • Electromagnetic fields self-image at half the classical scalar self-imaging distance.
    • Electric and magnetic energy densities exhibit self-imaging, unlike scalar field components.
    • Self-imaging distances for electric and magnetic energy densities can differ.
    • General expressions for TE and TM fields were derived.

    Conclusions:

    • Electromagnetic self-imaging presents distinct phenomena not predicted by scalar theory.
    • The derived expressions offer a comprehensive understanding of polarized field self-imaging.
    • This work extends the understanding of self-imaging to the full electromagnetic field.