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A table of physical constants expressed in SI units, with values, uncertainties and references. Includes constants related to speed of light, Planck constant, Boltzmann constant, Newtonian constant, cosmological constant, elementary charge, fine-structure constant and more.
Find the latest values of the fundamental physical constants from the National Institute of Standards and Technology (NIST), based on the recommendations of the Committee on Data for Science and Technology (CODATA). Search by name, category, or correlation coefficient, and access previous values and links to scientific data.
Fundamental Physical Constants — Extensive Listing. Relative std. Quantity Symbol Value Unit uncert. u. r. UNIVERSAL speed of light in vacuum c;c. 0299792458 m s1(exact) magnetic constant . 04π 107N A2. = 12:566370614::: 107N A2(exact) electric constant 1/ . 0c2 .
A physical constant is a quantity that cannot be explained by a theory and must be measured experimentally. Learn about the characteristics, examples, numerical values, and units of physical constants, and how they relate to the International System of Units and natural units.
10 cze 2009 · This database gives values of the basic constants and conversion factors of physics and chemistry resulting from the 2022 least-squares adjustment of the fundamental physical constants as published by the CODATA Task Group on Fundamental Constants and recommended for international use by CODATA.
Fundamental Physical Constants — Extensive Listing. 0c Newtonian constant of gravitationc μ0UNIVERSAL299 792 458 1.256 637 061 27(20) × 10−6 0.999 999 999 87(16) 8.854 187 8188(14) × 10−12 376.730 313 412(59) 6.674 30(15) × 10−11 6.708 83(15) × 10−39 6.626 070 15 × 10−34 4.135 667 696 . . . × 10−15 1.054 571 817 . . . × 10 ...
Fundamental Physical Constants. Values given below contain the (uncertainty) in the last two decimal places given in brackets. Values that do not have this uncertainty listed are exact.
