Physical Constant

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


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Fundamental Physical Constants (Institute for Chemistry and Biochemistry)
Physics, Constants, Units, & Uncertainty (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants (NIST)
CODATA Internationally recommended values of the Fundamental Physical Constants, Universal (NIST)
Physics Fundamentals (Martindale’s Reference Desk)


Physical constant, sometimes called fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. It is contrasted with a mathematical constant, which has a fixed numerical value, but does not directly involve any physical measurement.

There are many physical constants in science, some of the most widely recognized being the speed of light in vacuum c, the gravitational constant G, Planck’s constant h, the electric constant ε0, and the elementary charge e. Physical constants can take many dimensional forms: the speed-of-light signifies a maximum speed for any object and is expressed dimensionally as length divided by time; while the fine-structure constant α, which characterizes the strength of the electromagnetic interaction, is dimensionless. — Wikipedia

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


Physical Constants (Wolfram Alpha)


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

News, NPR Archives






More… - latest science and technology news stories 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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    on November 24, 2020 at 1:09 pm

    Recently, a research team led by Prof. SHENG Zhigao from the High Magnetic Field Laboratory of the Hefei Institutes of Physical Science (HFIPS), along with collaborators in HFIPS and ShanghaiTech University, invented a broad-band tunable terahertz (THz) absorber based on a strongly correlated electron oxide material.

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    on November 23, 2020 at 12:59 pm

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    on November 19, 2020 at 3:38 pm

    The process of examining characteristics of drug candidates thoroughly is essential for obtaining institutional approvals of new drugs for which high-quality crystallographic data are required. Indeed, growing large crystals of good quality from various substances serves a particular purpose for such processes and analyses. A recent study, affiliated with UNIST has introduced a novel crystal growth method, which enhances crystal growth 10 times faster than the average.