org.djunits.value.vdouble.scalar.base.Constants

public final class Constants
extends Object

Various physical constants. For many, see Wikipedia 2019 redefinition of the SI base units

Author:: Peter Knoppers

Field Summary

Fields
Modifier and Type	Field	Description
`static SIScalar`	`AVOGADRO`	Number of constituent particles in a Mole; a.k.a.
`static SIScalar`	`BOLTZMANN`	Boltzmann constant in Joule per Kelvin (this value is exact since the 2019 redefinition of SI base units).
`static Frequency`	`CESIUM133_FREQUENCY`	The Cesium 133 ground state hyperfine structure transition frequency.
`static ElectricalCharge`	`ELECTRONCHARGE`	Electrical charge of one electron.
`static Mass`	`ELECTRONMASS`	Mass of an electron.
`static SIScalar`	`G`	Gravitational constant, a.k.a.
`static Speed`	`LIGHTSPEED`	Speed of light in vacuum.
`static SIScalar`	`LUMINOUS_EFFICACY_540THZ`	The luminous efficacy Kcd of monochromatic radiation of frequency 540×10^12 Hz (540 THz).
`static Mass`	`NEUTRONMASS`	Mass of a neutron.
`static SIScalar`	`PLANCK`	Planck constant; ratio of a photon's energy and its frequency.
`static SIScalar`	`PLANKREDUCED`	Reduced Planck constant, a.k.a.
`static ElectricalCharge`	`PROTONCHARGE`	ElectricalCharge of one proton.
`static Mass`	`PROTONMASS`	Mass of a proton.
`static Dimensionless`	`TAU`	Ratio of circumference of circle and its radius.
`static SIScalar`	`VACUUMIMPEDANCE`	Impedance of vacuum.
`static SIScalar`	`VACUUMPERMEABILITY`	Permeability of vacuum.
`static SIScalar`	`VACUUMPERMITTIVITY`	Permittivity of vacuum.

Method Summary

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- AVOGADRO
  
  public static final SIScalar AVOGADRO
  
  Number of constituent particles in a Mole; a.k.a. Avogadro's number. This value is exact since the 2019 redefinition of the SI base units.
- BOLTZMANN
  
  public static final SIScalar BOLTZMANN
  
  Boltzmann constant in Joule per Kelvin (this value is exact since the 2019 redefinition of SI base units). See Wikipedia: Boltzmann constant
- CESIUM133_FREQUENCY
  
  public static final Frequency CESIUM133_FREQUENCY
  
  The Cesium 133 ground state hyperfine structure transition frequency. This value is exact since the 2006 redefinition of the SI base units.
- ELECTRONCHARGE
  
  public static final ElectricalCharge ELECTRONCHARGE
  
  Electrical charge of one electron. This value is exact since the 2019 redefinition of the SI base units.
- ELECTRONMASS
  
  public static final Mass ELECTRONMASS
  
  Mass of an electron. See Wikipedia Physical constant. This value of this physical constant has an uncertainty of 2.8e-40 kg.
- PROTONCHARGE
  
  public static final ElectricalCharge PROTONCHARGE
  
  ElectricalCharge of one proton.
- NEUTRONMASS
  
  public static final Mass NEUTRONMASS
  
  Mass of a neutron. See Wikipedia List of physical constants. This value of this physical constant has an uncertainty of 9.5e-37 kg.
- PROTONMASS
  
  public static final Mass PROTONMASS
  
  Mass of a proton. See Wikipedia Physical constant. This value of this physical constant has an uncertainty of 5.1e-37.
- G
  
  public static final SIScalar G
  
  Gravitational constant, a.k.a. Newtonian constant of gravitation. This is the 2018 best known approximation, which has an uncertainty 1.5e-15 m^3/kgs^2
- LIGHTSPEED
  
  public static final Speed LIGHTSPEED
  
  Speed of light in vacuum. This value is exact (since the 2006 redefinition of the SI base units).
- VACUUMPERMEABILITY
  
  public static final SIScalar VACUUMPERMEABILITY
  
  Permeability of vacuum. See Wikipedia, Vacuum permeability. The uncertainty of this value is 1.9e-16N/A^2.
- VACUUMPERMITTIVITY
  
  public static final SIScalar VACUUMPERMITTIVITY
  
  Permittivity of vacuum. See Wikipedia Vacuum permittivity. The uncertainty of this value is 1.3e-21 F/m.
- VACUUMIMPEDANCE
  
  public static final SIScalar VACUUMIMPEDANCE
  
  Impedance of vacuum.
- PLANCK
  
  public static final SIScalar PLANCK
  
  Planck constant; ratio of a photon's energy and its frequency. This value is exact since the 2019 redefinition of the SI base units.
- LUMINOUS_EFFICACY_540THZ
  
  public static final SIScalar LUMINOUS_EFFICACY_540THZ
  
  The luminous efficacy Kcd of monochromatic radiation of frequency 540×10^12 Hz (540 THz). This is the frequency of a green-colored light at approximately the peak sensitivity of the human eye. This value is exact since the 2006 redefinition of the SI base units.
- TAU
  
  public static final Dimensionless TAU
  
  Ratio of circumference of circle and its radius.
- PLANKREDUCED
  
  public static final SIScalar PLANKREDUCED
  
  Reduced Planck constant, a.k.a. angular Planck constant; Planck constant divided by 2 pi.

Class Constants

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Details