scipy.constants._codata

Fundamental Physical Constants

These constants are taken from CODATA Recommended Values of the Fundamental Physical Constants 2022.

Object

physical_constants

physical_constants

Functions

value(key):

Returns the value of the physical constant(key).

unit(key):

Returns the units of the physical constant(key).

precision(key):

Returns the relative precision of the physical constant(key).

find(sub):

Prints or returns list of keys containing the string sub, default is all.

Source

The values of the constants provided at this site are recommended for international use by CODATA and are the latest available. Termed the "2018 CODATA recommended values," they are generally recognized worldwide for use in all fields of science and technology. The values became available on 20 May 2019 and replaced the 2014 CODATA set. Also available is an introduction to the constants for non-experts at

https://physics.nist.gov/cuu/Constants/introduction.html

References

Theoretical and experimental publications relevant to the fundamental constants and closely related precision measurements published since the mid 1980s, but also including many older papers of particular interest, some of which date back to the 1800s. To search the bibliography, visit

https://physics.nist.gov/cuu/Constants/