Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Magnetism01:30

Magnetism

Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
Magnetic Fields01:28

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Magnetic Flux01:19

Magnetic Flux

The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
Magnetic Vector Potential01:15

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Preparing for your radiology future with AI: reflections from experience.

Clinical radiology·2026
Same author

Freshwater diatom persistence on clothing II: Further analysis of species assemblage dynamics over investigative timescales.

Forensic science international·2021
Same author

Freshwater diatom persistence on clothing I: A quantitative assessment of trace evidence dynamics over time.

Forensic science international·2021
Same author

Massively parallel sequencing is unlocking the potential of environmental trace evidence.

Forensic science international. Genetics·2020
Same author

The effects of flunixin meglumine and hoof trimming on lying behavior, locomotion, and milk production in lame and nonlame lactating dairy cows.

Journal of dairy science·2020
Same author

The affect of personality traits and decision-making style on postoperative quality of life and distress in patients undergoing pelvic exenteration.

Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland·2020

Related Experiment Video

Updated: Jul 12, 2026

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography
09:25

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Published on: July 26, 2019

Magnetoglow: a new geophysical resource.

C Y Johnson, J M Young, J C Holmes

    Science (New York, N.Y.)
    |January 29, 1971
    PubMed
    Summary
    This summary is machine-generated.

    Earth is surrounded by a glowing helium ion cloud, termed the "magnetoglow." This unique radiation, confined to the magnetosphere, offers new ways to study its dynamics.

    Related Experiment Videos

    Last Updated: Jul 12, 2026

    Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography
    09:25

    Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

    Published on: July 26, 2019

    Area of Science:

    • Space Physics
    • Plasma Physics
    • Atmospheric Science

    Background:

    • Earth is enveloped by a significant volume of glowing helium ions.
    • This ionic glow, observed at 304 angstroms, shares similarities with the geocoronal hydrogen glow in its high-altitude extension.
    • Unlike the hydrogen glow, this helium ion emission is primarily contained within the closed field line regions of the magnetosphere.

    Purpose of the Study:

    • To introduce and define the phenomenon of magnetoglow.
    • To highlight the unique magnetic confinement of this helium ion radiation.
    • To propose magnetoglow observations as a novel method for investigating magnetospheric dynamics.

    Main Methods:

    • Analysis of observational data from within and outside the magnetospheric cavity.
    • Characterization of the spatial distribution and spectral properties of the 304 angstrom emission.
    • Correlation of emission patterns with magnetospheric magnetic field line topology.

    Main Results:

    • Confirmation of a pervasive glow of helium ions surrounding Earth.
    • Identification of the glow's confinement to the closed field line region of the magnetosphere.
    • Observation of the glow extending to very high altitudes, similar to geocoronal hydrogen.

    Conclusions:

    • The helium ion glow, termed "magnetoglow," is a distinct magnetospheric phenomenon.
    • Its magnetic containment makes it a unique indicator of magnetospheric structure.
    • Future observations of magnetoglow will provide valuable insights into magnetospheric structural dynamics.