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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.

  • Newfound superconductor material could be the...
    on August 15, 2019 at 6:00 pm

    A potentially useful material for building quantum computers has been unearthed at the National Institute of Standards and Technology (NIST), whose scientists have found a superconductor that could sidestep one of the primary obstacles standing in the way of effective quantum logic circuits.

  • Super Proton Synchrotron to receive a new beam...
    on August 14, 2019 at 11:32 am

    By the end of the second long shutdown (LS2) of CERN's accelerator complex, a nine-metre-long object with several hundred tonnes of shielding will be installed around the beam line of the Super Proton Synchrotron (SPS). But this object, the longest single component of the SPS, is no ordinary one. It contains the new beam dump of the SPS, designed to absorb beams of particles whose flight through the SPS needs to be terminated. Deep inside the complex device will sit the actual absorbing […]

  • New millisecond pulsar discovered
    on August 13, 2019 at 10:00 am

    Astronomers have reported a serendipitous discovery of a new millisecond pulsar as part of an observational campaign using the Australian Square Kilometre Array Pathfinder (ASKAP) telescope. The newly detected pulsar has a spin period of about 2.77 ms and received designation PSR J1431−6328. The finding is detailed in a paper published August 8 on the arXiv pre-print repository.

  • Scientists can now control thermal profiles at...
    on August 10, 2019 at 5:33 am

    At human scale, controlling temperature is a straightforward concept. Turtles sun themselves to keep warm. To cool a pie fresh from the oven, place it on a room-temperature countertop.

  • Leaping larvae! How do they do that without legs?
    on August 9, 2019 at 4:53 am

    Attaching its head to its tail to form a ring, a 3-millimeter larva of the goldenrod gall midge squeezes some internal fluids into its tail section, swelling it and raising the pressure like an inner tube.