Cosma Home > Communication > Knowledge > Realm > Physical > Electromagnetism




Physical Realm
Physical Laws (Constants) Relativity
Matter Molecule, Atom (Periodic Table), Particle
Force Gravity, Electromagnetism (Light, Color)


These are organized by a classification scheme developed exclusively for Cosma. More…



Electromagnetism Portal (Wikipedia)


electromagnetism : a fundamental physical force that is responsible for interactions between charged particles which occur because of their charge and for the emission and absorption of photons, that is about a hundredth the strength of the strong force, and that extends over infinite distances but is dominant over atomic and molecular distances — called also electromagnetic force. — Webster

OneLook, Free Dictionary, Wiktionary, Urban Dictionary


Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords


Electromagnetism is a branch of physics involving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually exhibits electromagnetic fields such as electric fields, magnetic fields and light, and is one of the four fundamental interactions (commonly called forces) in nature. The other three fundamental interactions are the strong interaction, the weak interaction and gravitation. Electromagnetic phenomena are defined in terms of the electromagnetic force, sometimes called the Lorentz force, which includes both electricity and magnetism as different manifestations of the same phenomenon.

The electromagnetic force plays a major role in determining the internal properties of most objects encountered in daily life. Ordinary matter takes its form as a result of intermolecular forces between individual atoms and molecules in matter, and is a manifestation of the electromagnetic force. Electrons are bound by the electromagnetic force to atomic nuclei, and their orbital shapes and their influence on nearby atoms with their electrons is described by quantum mechanics. The electromagnetic force governs all chemical processes, which arise from interactions between the electrons of neighboring atoms. — Wikipedia

Electromagnetism (Eric Weisstein’s World of Physics, Wolfram Research)
Encyclopædia Britannica



Electricity & Magnetism (Wolfram Alpha)


Electronics (Innovations Report)


CODATA Internationally recommended values of the Fundamental Physical Constants, Electromagnetic (NIST Reference on Constants, Units and Uncertainty)


How Electricity Works (HowStuffWorks)
Electric Power Science Tracer Bullet (Library of Congress)
Electrical Engineering Subject Guide (University of Virginia Libraries)
Electrical Engineering (Wolfram Alpha)



The Kite Experiment (Wikipedia)

Lighting A Revolution: Joseph W. Swan (Smithsonian National Museum of American History)
Thomas Edison, Joseph Swan and The Real Deal Behind the Light Bulb (CIO)


WorldCat, Library of Congress, UPenn Online Books, Open Library



Explore the Electromagnetic Spectrum (Space Place, NASA)
Electricity and Magnetism (Fact Monster)


Electricity and Magnetism (MIT OCW Physics)
OER Commons: Open Educational Resources


Electromagnetism (Phys.org), NPR Archives









Snap Circuits Kits (Elenco)



Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • China's FAST telescope could detect...
    on October 15, 2021 at 2:00 pm

    One of the most challenging questions to answer when confronting the Fermi paradox is why exponentially scaling technologies haven't taken over the universe by now. Commonly known as von Neumann probes, the idea of a self-replicating swarm of extraterrestrial robots has been a staple of science fiction for decades. But so far, there has never been any evidence of their existence outside the realm of fiction. That might be because we haven't spent a lot of time looking for them—and that could […]

  • Unifying models of chorus wave frequency chirping
    on October 15, 2021 at 11:17 am

    Whistler mode chorus waves are electromagnetic emissions common in planetary magnetospheres. Among other impacts, their scattering of magnetospheric electrons is one driver for the formation of auroras. An important attribute of these waves is frequency chirping, in which the frequency of the emission rises or falls nearly monotonically with time.

  • Next-generation telescopes could detect the...
    on October 14, 2021 at 2:35 pm

    The first black holes to appear in the universe may have formed from the direct collapse of gas. When they collapsed, they released a flood of radiation, including radio waves. A new study has found that the next generation of massive radio telescopes may be able to detect these bursts, giving precious insights into a critical epoch in the history of the universe.

  • Novel experiment measures neutron skin in calcium
    on October 12, 2021 at 7:11 pm

    A new high-precision measurement of the neutron skin in doubly magic calcium-48 may help shed light on proton-neutron interactions inside nuclei. This is the first highly robust electroweak measurement of the neutron skin in a medium-weight nucleus. The results from this new measurement, made by the 48Ca Radius EXperiment (CREX) collaboration at DOE's Thomas Jefferson National Accelerator Facility, will be presented at the 2021 Fall Meeting of the APS Division of Nuclear Physics.

  • Strange radio waves emerge from the direction of...
    on October 12, 2021 at 10:00 am

    Astronomers have discovered unusual signals coming from the direction of the Milky Way's center. The radio waves fit no currently understood pattern of variable radio source and could suggest a new class of stellar object.