ઢાંચો:Physical constants/doc

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This template provides easy inclusion of recent values of physical constants in articles. Presently, it returns CODATA 2018 recommended values, but the template will be updated when more recent values become available. This includes the 2019 redefinition of SI base units, which made the values of several constants exact (e.g. e), whereas some previously exactly defined constants acquired an uncertainty (e.g. μ0).

Usage[ફેરફાર કરો]

Arguments[ફેરફાર કરો]

symbol
If set to yes, the value is preceded by the symbol of the constant, followed by or = depending on whether or not round is set.
round
If omitted, the value is shown along with its standard uncertainty. If set to an integer n, the value is rounded to the first n digits after the decimal point (retaining trailing zeros).
unit
If set to no, the unit of measurement is not shown.
ref
If set to no, no reference is given. If set to only, only the reference is given.
after
Text (e.g. punctuation) to be shown after the constant before the reference.
runc
If set to yes, this will provide only the relative standard uncertainty of the value and its reference.

Available constants[ફેરફાર કરો]

Code Constant Value Relative standard uncertainty
a0 Bohr radius ઢાંચો:Physical constants/doc/data/disp
alpha fine-structure constant ઢાંચો:Physical constants/doc/data/disp
A90 conventional ampere ઢાંચો:Physical constants/doc/data/disp
atm standard atmosphere ઢાંચો:Physical constants/doc/data/disp
bwien Wien wavelength displacement law constant ઢાંચો:Physical constants/doc/data/disp
bwien' Wien frequency displacement law constant ઢાંચો:Physical constants/doc/data/disp
c speed of light ઢાંચો:Physical constants/doc/data/disp
c1 first radiation constant ઢાંચો:Physical constants/doc/data/disp
c1L first radiation constant for spectral radiance ઢાંચો:Physical constants/doc/data/disp
c2 second radiation constant ઢાંચો:Physical constants/doc/data/disp
C90 conventional coulomb ઢાંચો:Physical constants/doc/data/disp
DnuCs hyperfine structure transition frequency of caesium-133 ઢાંચો:Physical constants/doc/data/disp
e elementary charge ઢાંચો:Physical constants/doc/data/disp
Eh Hartree energy ઢાંચો:Physical constants/doc/data/disp
EheV Hartree energy in eV ઢાંચો:Physical constants/doc/data/disp
eps0 vacuum electric permittivity ઢાંચો:Physical constants/doc/data/disp
eV electronvolt ઢાંચો:Physical constants/doc/data/disp
F Faraday constant ઢાંચો:Physical constants/doc/data/disp
F90 conventional farad ઢાંચો:Physical constants/doc/data/disp
G gravitational constant ઢાંચો:Physical constants/doc/data/disp
G0 conductance quantum ઢાંચો:Physical constants/doc/data/disp
g0 standard acceleration of gravity ઢાંચો:Physical constants/doc/data/disp
ge electron g-factor ઢાંચો:Physical constants/doc/data/disp
GF/hbarc3 Fermi coupling constant ઢાંચો:Physical constants/doc/data/disp
gmu muon g-factor ઢાંચો:Physical constants/doc/data/disp
gp proton g-factor ઢાંચો:Physical constants/doc/data/disp
h Planck constant ઢાંચો:Physical constants/doc/data/disp
H90 conventional henry ઢાંચો:Physical constants/doc/data/disp
hbar reduced Planck constant ઢાંચો:Physical constants/doc/data/disp
h/2me quantum of circulation ઢાંચો:Physical constants/doc/data/disp
invalpha inverse fine-structure constant ઢાંચો:Physical constants/doc/data/disp
invG0 inverse conductance quantum ઢાંચો:Physical constants/doc/data/disp
k Boltzmann constant ઢાંચો:Physical constants/doc/data/disp
KJ Josephson constant ઢાંચો:Physical constants/doc/data/disp
KJ90 conventional value of Josephson constant ઢાંચો:Physical constants/doc/data/disp
lP Planck length ઢાંચો:Physical constants/doc/data/disp
MC12 molar mass of carbon-12 ઢાંચો:Physical constants/doc/data/disp
me electron mass ઢાંચો:Physical constants/doc/data/disp
mmu muon mass ઢાંચો:Physical constants/doc/data/disp
mn neutron mass ઢાંચો:Physical constants/doc/data/disp
mnDa neutron mass in daltons ઢાંચો:Physical constants/doc/data/disp
mP Planck mass ઢાંચો:Physical constants/doc/data/disp
mp proton mass ઢાંચો:Physical constants/doc/data/disp
mpome proton-to-electron mass ratio ઢાંચો:Physical constants/doc/data/disp
mtau tau mass ઢાંચો:Physical constants/doc/data/disp
Mu molar mass constant ઢાંચો:Physical constants/doc/data/disp
mu atomic mass constant ઢાંચો:Physical constants/doc/data/disp
muc2 atomic mass constant energy equivalent ઢાંચો:Physical constants/doc/data/disp
mueV atomic mass constant energy equivalent in MeV ઢાંચો:Physical constants/doc/data/disp
mu0 vacuum magnetic permeability ઢાંચો:Physical constants/doc/data/disp
muB Bohr magneton ઢાંચો:Physical constants/doc/data/disp
muN nuclear magneton ઢાંચો:Physical constants/doc/data/disp
NA Avogadro constant ઢાંચો:Physical constants/doc/data/disp
NAh molar Planck constant ઢાંચો:Physical constants/doc/data/disp
ohm90 conventional ohm ઢાંચો:Physical constants/doc/data/disp
Phi0 magnetic flux quantum ઢાંચો:Physical constants/doc/data/disp
R gas constant ઢાંચો:Physical constants/doc/data/disp
re classical electron radius ઢાંચો:Physical constants/doc/data/disp
Rinf Rydberg constant ઢાંચો:Physical constants/doc/data/disp
RK von Klitzing constant ઢાંચો:Physical constants/doc/data/disp
RK90 conventional value of von Klitzing constant ઢાંચો:Physical constants/doc/data/disp
sigma Stefan–Boltzmann constant ઢાંચો:Physical constants/doc/data/disp
sigmae Thomson cross section ઢાંચો:Physical constants/doc/data/disp
TP Planck temperature ઢાંચો:Physical constants/doc/data/disp
tP Planck time ઢાંચો:Physical constants/doc/data/disp
V90 conventional volt ઢાંચો:Physical constants/doc/data/disp
VmSi molar volume of silicon ઢાંચો:Physical constants/doc/data/disp
W90 conventional watt ઢાંચો:Physical constants/doc/data/disp
Z0 characteristic impedance of vacuum ઢાંચો:Physical constants/doc/data/disp

Examples[ફેરફાર કરો]

{{Physical constants|c|unit=no|after= [[metre per second|metres per second]].}}

299792458 metres per second.[૧]

{{Physical constants|mu0|symbol=yes}}

μ0 = 1.25663706212(19)×10−6 N⋅A−2[૨]

{{Physical constants|G|symbol=yes}}

G = 6.67430(15)×10−11 m3⋅kg−1⋅s−2[૩]

{{Physical constants|hbar|round=2|symbol=yes}}

ħ ≈ 1.05×10−34 J⋅s[૪]

The relative standard uncertainty of ''m''<sub>u</sub> is {{Physical constants|mu|runc=yes|after=.}}

The relative standard uncertainty of mu is 3.0×10−10.[૫]

For the electron mass, {{Physical constants|me|runc=yes|symbol=yes|ref=no}}.

For the electron mass, ur(me) = 3.0×10−10.

NIST publishes the CODATA value of the [[elementary charge]].{{Physical constants|e|ref=only}}

NIST publishes the CODATA value of the elementary charge.[૬]

See also[ફેરફાર કરો]

{{CODATA2010}}

References[ફેરફાર કરો]

  1. "2018 CODATA Value: speed of light in vacuum". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Check date values in: |accessdate=, |date= (મદદ)
  2. "2018 CODATA Value: vacuum magnetic permeability". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Check date values in: |accessdate=, |date= (મદદ)
  3. "2018 CODATA Value: Newtonian constant of gravitation". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Check date values in: |accessdate=, |date= (મદદ)
  4. "2018 CODATA Value: reduced Planck constant". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-08-28. Check date values in: |accessdate=, |date= (મદદ)
  5. "2018 CODATA Value: atomic mass constant". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Check date values in: |accessdate=, |date= (મદદ)
  6. "2018 CODATA Value: elementary charge". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Check date values in: |accessdate=, |date= (મદદ)