Class FourLevels.Electron

java.lang.Object
  |
  +--EmissionApplet.Electron
        |
        +--FourLevels.Electron

Enclosing class:

FourLevels

class FourLevels.Electron

extends EmissionApplet.Electron

Field Summary

protected int	energyLevel The present energy level, or the energy level toward which the particle is moving.
protected int	oldLevel The previoud energy level, or the energy level from which the particle is moving.

Fields inherited from class EmissionApplet.Electron

excited, progress, x

Constructor Summary

FourLevels.Electron(double x)
Creates a new electron

FourLevels.Electron(double x, int level)
Creates a new electron

Method Summary

void	absorb(EmissionApplet.Photon p) Absorbs the specified photon, causing this electron to become excited.
boolean	canAbsorb() Indicates whether this electron is in a suitable state to absorb a photon.
boolean	canEmit() Indicates whether this electron is in a suitable state for stimulated emission of a photon.
void	emit(EmissionApplet.Photon p) Emits the specified photon, causing this electron to become non-excited.
boolean	isExcited() For backward compatibility, returns the same result as canEmit().
void	moveToLevel(int l) Causes the electron to begin moving to a specified energy level.
void	paint(java.awt.Graphics g, double xscl, double yscl) Displays this Electron
void	pump() Moves this electron to the upper energy level
void	setExcited(boolean b) For backwards compatibility.
void	update(double dt) Advances this photon through time by the specified interval

Methods inherited from class EmissionApplet.Electron

isMoving

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

energyLevel

protected int energyLevel

The present energy level, or the energy level toward which the particle is moving.

oldLevel

protected int oldLevel

The previoud energy level, or the energy level from which the particle is moving. This value will be zero if the electron has never changed energy levels.

Constructor Detail

FourLevels.Electron

public FourLevels.Electron(double x,
                           int level)

Creates a new electron

Parameters:

x - The x position

level - An integer in the range [0,3] specifying the initial energy level

Throws:

java.lang.IllegalArgumentException - if level is less than 0 or greateer than 3

FourLevels.Electron

public FourLevels.Electron(double x)

Creates a new electron

Parameters:

x - The x position

Method Detail

paint

public void paint(java.awt.Graphics g,
                  double xscl,
                  double yscl)

Displays this Electron

Overrides:

paint in class EmissionApplet.Electron

Parameters:

g - The Graphics surface on which to paint

xscl - Multiplier to convert simulation x coordinates to screen coordinates

yscl - Multiplier to convert simulation y coordinates to screen coordinates

absorb

public void absorb(EmissionApplet.Photon p)

Absorbs the specified photon, causing this electron to become excited.

Overrides:

absorb in class EmissionApplet.Electron

emit

public void emit(EmissionApplet.Photon p)

Emits the specified photon, causing this electron to become non-excited.

Overrides:

emit in class EmissionApplet.Electron

pump

public void pump()

Moves this electron to the upper energy level

Overrides:

pump in class EmissionApplet.Electron

isExcited

public boolean isExcited()

For backward compatibility, returns the same result as canEmit().

Overrides:

isExcited in class EmissionApplet.Electron

Tags copied from class: EmissionApplet.Electron

Returns:

true if this electron is excited, else false

canAbsorb

public boolean canAbsorb()

Description copied from class: EmissionApplet.Electron

Indicates whether this electron is in a suitable state to absorb a photon.

Overrides:

canAbsorb in class EmissionApplet.Electron

canEmit

public boolean canEmit()

Description copied from class: EmissionApplet.Electron

Indicates whether this electron is in a suitable state for stimulated emission of a photon.

Overrides:

canEmit in class EmissionApplet.Electron

moveToLevel

public void moveToLevel(int l)

Causes the electron to begin moving to a specified energy level.

update

public void update(double dt)

Advances this photon through time by the specified interval

Overrides:

update in class EmissionApplet.Electron

setExcited

public void setExcited(boolean b)

For backwards compatibility. Sets the energy level to one of the two centre states.

Overrides:

setExcited in class EmissionApplet.Electron

Parameters:

b - true if the electron is to be moved to state 1, false if it is to move to state 2.