JScience v4.3

org.jscience.physics.amount
Class Constants

java.lang.Object
  extended by org.jscience.physics.amount.Constants

public final class Constants
extends java.lang.Object

This class provides most accurate physical constants measurement; the more accurate the constants, the higher the precision of the calculations making use of these constants.

Constant names use the full range of Unicode characters and are mixed uppercase/lowercase to resemble symbolic names as much as possible

Reference: CODATA Internationally recommended values of the Fundamental Physical Constants (2002)

Version:
3.1, April 7, 2006
Author:
Jean-Marie Dautelle

Field Summary
static Amount<?> µ0
          Holds the permeability of vacuum or magnetic constant.
static Amount<?> µB
          Holds the Bohr magneton (ℏ·e/2me)
static Amount<?> µN
          Holds the nuclear magneton (ℏ·e/2mp)
static Amount<Length> a0
          Holds the Bohr radius (α/(4π·Rinf))
static Amount<Mass> amu
          Holds the unified atomic mass unit (0.001 kg/mol)/N
static Amount<Velocity> c
          Holds the speed of light in vacuum (exact).
static Amount<?> c_square
          Holds c².
static Amount<ElectricCharge> e
          Holds the elementary charge (positron charge).
static Amount<?> Eh
          Holds the Hartree energy (2Rinf·h·c)
static Amount<?> F
          Holds the Faraday constant (N·e)
static Amount<Dimensionless> four_π
          Holds 4·π.
static Amount<Acceleration> g
          Holds the standard acceleration due to gravity (approximately equal to the acceleration due to gravity on the Earth's surface).
static Amount<?> G
          Holds the Newtonian constant of gravitation.
static Amount<ElectricConductance> G0
          Holds the conductance quantum (2e²/h)
static Amount<Dimensionless> half_π
          Holds π/2.
static Amount<?> k
          Holds the Boltzmann constant.
static Amount<Length> lP
          Holds the Planck length (ℏ/(mP·c))
static Amount<Mass> md
          Holds the deuteron rest mass.
static Amount<Mass> me
          Holds the electron rest mass.
static Amount<Mass> mn
          Holds the neutron rest mass.
static Amount<Mass> mp
          Holds the proton rest mass.
static Amount<Mass> mP
          Holds the Planck mass (ℏ·c/G)1/2
static Amount<Mass>
          Holds the muon rest mass.
static Amount<?> N
          Holds the Avogadro constant.
static Amount<?> R
          Holds the molar gas constant (N·k)
static Amount<?> Rinf
          Holds the Rydberg constant (α²·me·c/2h).
static Amount<Duration> tP
          Holds the Planck time (lP/c)
static Amount<Dimensionless> two_π
          Holds 2·π.
static Amount<ElectricResistance> Z0
          Holds the characteristic impedance of vacuum (µ0·c).
static Amount<MagneticFlux> Φ0
          Holds the magnetic flux quantum (h/2e)
static Amount<Dimensionless> α
          Holds the fine structure constant (e²/(2·ε0·c·h))
static Amount<?> ε0
          Holds the permittivity of vacuum or electric constant (1/(µ0·c²))
static Amount<Dimensionless> π
          Holds the ratio of the circumference of a circle to its diameter.
static Amount<Dimensionless> π_square
          Holds π².
static Amount<?> σ
          Holds the Stefan-Boltzmann constant ((π²/60)·k4/(ℏ³·c²))
static Amount<?>
          Holds the Planck constant.
static Amount<?>
          Holds the Planck constant over 2π.
 
Method Summary
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

g

public static final Amount<Acceleration> g
Holds the standard acceleration due to gravity (approximately equal to the acceleration due to gravity on the Earth's surface).

See Also:
Wikipedia: Acceleration due to gravity

me

public static final Amount<Mass> me
Holds the electron rest mass.


mp

public static final Amount<Mass> mp
Holds the proton rest mass.


mn

public static final Amount<Mass> mn
Holds the neutron rest mass.


md

public static final Amount<Mass> md
Holds the deuteron rest mass.


public static final Amount<Mass> 
Holds the muon rest mass.


π

public static final Amount<Dimensionless> π
Holds the ratio of the circumference of a circle to its diameter.


half_π

public static final Amount<Dimensionless> half_π
Holds π/2.


two_π

public static final Amount<Dimensionless> two_π
Holds 2·π.


four_π

public static final Amount<Dimensionless> four_π
Holds 4·π.


π_square

public static final Amount<Dimensionless> π_square
Holds π².


c

public static final Amount<Velocity> c
Holds the speed of light in vacuum (exact).


c_square

public static final Amount<?> c_square
Holds c².


k

public static final Amount<?> k
Holds the Boltzmann constant.

See Also:
Wikipedia: Boltzmann constant

public static final Amount<?> 
Holds the Planck constant.

See Also:
Wikipedia: Plank's constant

public static final Amount<?> 
Holds the Planck constant over 2π.


e

public static final Amount<ElectricCharge> e
Holds the elementary charge (positron charge).

See Also:
Wikipedia: Elementary Charge

µ0

public static final Amount<?> µ0
Holds the permeability of vacuum or magnetic constant.

See Also:
Wikipedia: Permeability (electromagnetism)

ε0

public static final Amount<?> ε0
Holds the permittivity of vacuum or electric constant (1/(µ0·c²))

See Also:
Wikipedia: Permittivity

Z0

public static final Amount<ElectricResistance> Z0
Holds the characteristic impedance of vacuum (µ0·c).


α

public static final Amount<Dimensionless> α
Holds the fine structure constant (e²/(2·ε0·c·h))

See Also:
Wikipedia: Fine Structure Constant

G

public static final Amount<?> G
Holds the Newtonian constant of gravitation.

See Also:
Wikipedia: Gravitational Constant

N

public static final Amount<?> N
Holds the Avogadro constant.

See Also:
Wikipedia: Avogadro's number

R

public static final Amount<?> R
Holds the molar gas constant (N·k)

See Also:
Wikipedia: Gas constant

F

public static final Amount<?> F
Holds the Faraday constant (N·e)

See Also:
Wikipedia: Faraday constant

σ

public static final Amount<?> σ
Holds the Stefan-Boltzmann constant ((π²/60)·k4/(ℏ³·c²))


amu

public static final Amount<Mass> amu
Holds the unified atomic mass unit (0.001 kg/mol)/N


Rinf

public static final Amount<?> Rinf
Holds the Rydberg constant (α²·me·c/2h).

See Also:
Wikipedia: Rydberg constant

a0

public static final Amount<Length> a0
Holds the Bohr radius (α/(4π·Rinf))


Eh

public static final Amount<?> Eh
Holds the Hartree energy (2Rinf·h·c)


Φ0

public static final Amount<MagneticFlux> Φ0
Holds the magnetic flux quantum (h/2e)


G0

public static final Amount<ElectricConductance> G0
Holds the conductance quantum (2e²/h)


µB

public static final Amount<?> µB
Holds the Bohr magneton (ℏ·e/2me)


µN

public static final Amount<?> µN
Holds the nuclear magneton (ℏ·e/2mp)


mP

public static final Amount<Mass> mP
Holds the Planck mass (ℏ·c/G)1/2


lP

public static final Amount<Length> lP
Holds the Planck length (ℏ/(mP·c))


tP

public static final Amount<Duration> tP
Holds the Planck time (lP/c)


JScience v4.3

Copyright © 2006 JScience.