PhysicalConstants (STIL)

java.lang.Object
- uk.ac.starlink.util.PhysicalConstants

```
public class PhysicalConstants
extends java.lang.Object
```
Class of physical and astronomical constants. Please add more and check accuracy.

Field Summary

Fields
Modifier and Type	Field and Description
`static double`	`ACCEL_GRAV` Standard acceleration of gravity on Earth m.s^-2
`static double`	`AU` 1 Astronomical unit - m
`static double`	`BOLTZMANN` Boltzmann constant - J.K^-1
`static double`	`ELECTRON_MASS` Electron mass - Kg
`static double`	`ELECTRON_VOLT` Electron volt - J
`static double`	`FINE_STRUCTURE` Fine structure constant - unitless
`static double`	`GRAVITATION` Gravitational constant - N.m^2.Kg^-2
`static double`	`JANSKY` 1 Jansky - W.m^-2.Hz^-1
`static double`	`LUMINOSITY_OF_SUN` Solar Luminosity - W
`static double`	`MASS_OF_EARTH` Mass of the Earth - Kg
`static double`	`MASS_OF_JUPITER` Mass of Jupiter - Kg
`static double`	`MASS_OF_SUN` Mass of Sun - Kg
`static double`	`PARSEC` 1 Parsec - m
`static double`	`PLANCK` Planck constant - J.s
`static double`	`PLANCK_BAR` Planck constant/2*PI - J.s
`static double`	`PLANCK_EVS` Planck constant - eV.s
`static double`	`PLANCK_EVS_BAR` Planck constant/2*PI - eV.s
`static double`	`PLANCK_LENGTH` Planck length - m
`static double`	`PLANCK_MASS` Planck mass - Kg
`static double`	`PLANCK_TEMP` Planck temperature - K
`static double`	`PROTON_MASS` Proton mass - Kg
`static double`	`RADIUS_OF_SUN` Radius of Sun - m
`static double`	`RYDBERG` Rydberg constant - m^-1
`static double`	`SOLAR_CONSTANT` Solar constant - kW.m^-1
`static double`	`SPEED_OF_LIGHT` Speed of light in a vacuum - m.s^-1
`static double`	`STEFAN_BOLTZMANN` Stefan-Boltzmann constant - W.m^-2.K^-4
`static double`	`WAVE_HALPHA` Wavelength of H-alpha - Angstroms
`static double`	`WIEN_DISPLACEMENT` Wien displacement law constant - m.K

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type Method and Description

static PhysicalConstants getInstance()
Get instance of class for aliasing.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static PhysicalConstants`	`getInstance()` Get instance of class for aliasing.

- Field Detail
  - SPEED_OF_LIGHT
```
public static final double SPEED_OF_LIGHT
```
    Speed of light in a vacuum - m.s^-1
    
    See Also:
    
    Constant Field Values
  - PLANCK
```
public static final double PLANCK
```
    Planck constant - J.s
    
    See Also:
    
    Constant Field Values
  - PLANCK_BAR
```
public static final double PLANCK_BAR
```
    Planck constant/2*PI - J.s
    
    See Also:
    
    Constant Field Values
  - PLANCK_EVS
```
public static final double PLANCK_EVS
```
    Planck constant - eV.s
    
    See Also:
    
    Constant Field Values
  - PLANCK_EVS_BAR
```
public static final double PLANCK_EVS_BAR
```
    Planck constant/2*PI - eV.s
    
    See Also:
    
    Constant Field Values
  - PLANCK_LENGTH
```
public static final double PLANCK_LENGTH
```
    Planck length - m
    
    See Also:
    
    Constant Field Values
  - PLANCK_MASS
```
public static final double PLANCK_MASS
```
    Planck mass - Kg
    
    See Also:
    
    Constant Field Values
  - PLANCK_TEMP
```
public static final double PLANCK_TEMP
```
    Planck temperature - K
    
    See Also:
    
    Constant Field Values
  - BOLTZMANN
```
public static final double BOLTZMANN
```
    Boltzmann constant - J.K^-1
    
    See Also:
    
    Constant Field Values
  - GRAVITATION
```
public static final double GRAVITATION
```
    Gravitational constant - N.m^2.Kg^-2
    
    See Also:
    
    Constant Field Values
  - ACCEL_GRAV
```
public static final double ACCEL_GRAV
```
    Standard acceleration of gravity on Earth m.s^-2
    
    See Also:
    
    Constant Field Values
  - ELECTRON_MASS
```
public static final double ELECTRON_MASS
```
    Electron mass - Kg
    
    See Also:
    
    Constant Field Values
  - PROTON_MASS
```
public static final double PROTON_MASS
```
    Proton mass - Kg
    
    See Also:
    
    Constant Field Values
  - FINE_STRUCTURE
```
public static final double FINE_STRUCTURE
```
    Fine structure constant - unitless
    
    See Also:
    
    Constant Field Values
  - ELECTRON_VOLT
```
public static final double ELECTRON_VOLT
```
    Electron volt - J
    
    See Also:
    
    Constant Field Values
  - STEFAN_BOLTZMANN
```
public static final double STEFAN_BOLTZMANN
```
    Stefan-Boltzmann constant - W.m^-2.K^-4
    
    See Also:
    
    Constant Field Values
  - RYDBERG
```
public static final double RYDBERG
```
    Rydberg constant - m^-1
    
    See Also:
    
    Constant Field Values
  - WIEN_DISPLACEMENT
```
public static final double WIEN_DISPLACEMENT
```
    Wien displacement law constant - m.K
    
    See Also:
    
    Constant Field Values
  - WAVE_HALPHA
```
public static final double WAVE_HALPHA
```
    Wavelength of H-alpha - Angstroms
    
    See Also:
    
    Constant Field Values
  - AU
```
public static final double AU
```
    1 Astronomical unit - m
    
    See Also:
    
    Constant Field Values
  - PARSEC
```
public static final double PARSEC
```
    1 Parsec - m
    
    See Also:
    
    Constant Field Values
  - MASS_OF_SUN
```
public static final double MASS_OF_SUN
```
    Mass of Sun - Kg
    
    See Also:
    
    Constant Field Values
  - RADIUS_OF_SUN
```
public static final double RADIUS_OF_SUN
```
    Radius of Sun - m
    
    See Also:
    
    Constant Field Values
  - LUMINOSITY_OF_SUN
```
public static final double LUMINOSITY_OF_SUN
```
    Solar Luminosity - W
    
    See Also:
    
    Constant Field Values
  - MASS_OF_EARTH
```
public static final double MASS_OF_EARTH
```
    Mass of the Earth - Kg
    
    See Also:
    
    Constant Field Values
  - MASS_OF_JUPITER
```
public static final double MASS_OF_JUPITER
```
    Mass of Jupiter - Kg
    
    See Also:
    
    Constant Field Values
  - SOLAR_CONSTANT
```
public static final double SOLAR_CONSTANT
```
    Solar constant - kW.m^-1
    
    See Also:
    
    Constant Field Values
  - JANSKY
```
public static final double JANSKY
```
    1 Jansky - W.m^-2.Hz^-1
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getInstance
```
public static PhysicalConstants getInstance()
```
    Get instance of class for aliasing. That is could use:
```
 PhysicalConstants PC = PhysicalConstants.getInstance();
 System.out.println( "Speed of light = " + PC.SPEED_OF_LIGHT );
 
```
    to cut down on verbage.

Class PhysicalConstants

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SPEED_OF_LIGHT

PLANCK

PLANCK_BAR

PLANCK_EVS

PLANCK_EVS_BAR

PLANCK_LENGTH

PLANCK_MASS

PLANCK_TEMP

BOLTZMANN

GRAVITATION

ACCEL_GRAV

ELECTRON_MASS

PROTON_MASS

FINE_STRUCTURE

ELECTRON_VOLT

STEFAN_BOLTZMANN

RYDBERG

WIEN_DISPLACEMENT

WAVE_HALPHA

AU

PARSEC

MASS_OF_SUN

RADIUS_OF_SUN

LUMINOSITY_OF_SUN

MASS_OF_EARTH

MASS_OF_JUPITER

SOLAR_CONSTANT

JANSKY

Method Detail

getInstance