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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
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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
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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.
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Diamonds are forever – whether made in a lab or...
on December 12, 2018 at 3:12 pm
It's diamond season. Almost 40 percent of American engagements happen between Thanksgiving and Valentine's Day, with Christmas the most popular day to pop the question – and hand over a sparkly piece of ice. Jewelry stores do at least double their usual monthly sales in December. […]
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Physicists edge closer to controlling chemical...
on December 11, 2018 at 2:50 pm
A team of researchers from the Moscow Institute of Physics and Technology, and Aarhus University in Denmark has developed an algorithm for predicting the effect of an external electromagnetic field on the state of complex molecules. The algorithm, which is based on a theory developed earlier by the same team, predicts tunneling ionization rates of molecules. This refers to the probability that an electron will bypass the potential barrier and escape from its parent molecule. The new algorithm, […]
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Terahertz laser for sensing and imaging...
on December 11, 2018 at 12:40 pm
A terahertz laser designed by MIT researchers is the first to reach three key performance goals at once—high constant power, tight beam pattern, and broad electric frequency tuning—and could thus be valuable for a wide range of applications in chemical sensing and imaging. […]
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Hunting for rare isotopes: The mysterious...
on December 7, 2018 at 3:40 pm
When you hear the term "radioactive" you likely think "bad news," maybe along the lines of fallout from an atomic bomb. […]
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Multichannel vectorial holographic display and...
on December 7, 2018 at 2:30 pm
Holography is a powerful tool that can reconstruct wavefronts of light and combine the fundamental wave properties of amplitude, phase, polarization, wave vector and frequency. Smart multiplexing techniques (multiple signal integration) together with metasurface designs are currently in high demand to explore the capacity to engineer information storage systems and enhance optical encryption security using such metasurface holograms. […]