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Coupling (physics)
 
 
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In physics
Physics

Physics is the natural science which examines basic concepts such as energy, force, and spacetime and all that derives from these, such as mass, charge, matter and its Motion ....
, two systems are coupled if they are interacting
Interaction

Interaction is a kind of action that occurs as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way causal effect....
 with each other. Of special interest is the coupling of two (or more) vibratory systems (e.g. pendula
Pendulum

A pendulum is a weight suspended from a pivot so it can swing freely.When a pendulum is displaced from its resting Mechanical equilibrium, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position....
 or resonant circuits) by means of spring
Spring (device)

A spring is an Elasticity object used to store mechanical energy. Springs are usually made out of hardened steel. Small springs can be wound from pre-hardened stock, while larger ones are made from annealing steel and hardened after fabrication....
s or magnetic field
Magnetic field

A magnetism field is a vector field which can exert a magnetic force on moving electric charges and on magnetic dipoles . When placed in a magnetic field, magnetic dipoles tend to align their axes parallel to the magnetic field....
s, etc. Characteristic for a coupled oscillation is the effect of beat
Beat (acoustics)

In acoustics, a beat is an interference between two sounds of slightly different frequency, perceived as periodic variations in volume whose rate is the difference between the two frequencies....
.

The concept of coupling is particularly important in physical cosmology
Physical cosmology

Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution....
, in which various forms of matter
Matter

In common usage, matter is anything that has both mass and volume . A more rigorous definition is used in science: matter is what atoms and molecules are made of....
 gradually decouple and recouple
Recombination

Recombination may refer to:* Genetic recombination, the process by which genetic material is broken and joined to other genetic material* Carrier generation and recombination, processes by which mobile electrons and electron holes are created and eliminated...
 between each other.

Coupling is also important in physics for the generation of plasma
Plasma (physics)

In physics and chemistry, plasma is a partially ionized gas, in which a certain proportion of electrons are free rather than being bound to an atom or molecule....
s.






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Encyclopedia


In physics
Physics

Physics is the natural science which examines basic concepts such as energy, force, and spacetime and all that derives from these, such as mass, charge, matter and its Motion ....
, two systems are coupled if they are interacting
Interaction

Interaction is a kind of action that occurs as two or more objects have an effect upon one another. The idea of a two-way effect is essential in the concept of interaction, as opposed to a one-way causal effect....
 with each other. Of special interest is the coupling of two (or more) vibratory systems (e.g. pendula
Pendulum

A pendulum is a weight suspended from a pivot so it can swing freely.When a pendulum is displaced from its resting Mechanical equilibrium, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position....
 or resonant circuits) by means of spring
Spring (device)

A spring is an Elasticity object used to store mechanical energy. Springs are usually made out of hardened steel. Small springs can be wound from pre-hardened stock, while larger ones are made from annealing steel and hardened after fabrication....
s or magnetic field
Magnetic field

A magnetism field is a vector field which can exert a magnetic force on moving electric charges and on magnetic dipoles . When placed in a magnetic field, magnetic dipoles tend to align their axes parallel to the magnetic field....
s, etc. Characteristic for a coupled oscillation is the effect of beat
Beat (acoustics)

In acoustics, a beat is an interference between two sounds of slightly different frequency, perceived as periodic variations in volume whose rate is the difference between the two frequencies....
.

The concept of coupling is particularly important in physical cosmology
Physical cosmology

Physical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution....
, in which various forms of matter
Matter

In common usage, matter is anything that has both mass and volume . A more rigorous definition is used in science: matter is what atoms and molecules are made of....
 gradually decouple and recouple
Recombination

Recombination may refer to:* Genetic recombination, the process by which genetic material is broken and joined to other genetic material* Carrier generation and recombination, processes by which mobile electrons and electron holes are created and eliminated...
 between each other.

Coupling is also important in physics for the generation of plasma
Plasma (physics)

In physics and chemistry, plasma is a partially ionized gas, in which a certain proportion of electrons are free rather than being bound to an atom or molecule....
s. In electrical discharges, the coupling of an exciting field and a medium creates plasmas. The quality of the coupling of an exciting field of given frequency to a charged particle depends on resonance
Resonance

In physics, resonance is the tendency of a system to oscillate at maximum amplitude at certain Frequency, known as the system's resonance frequencies ....
.

See also


  • Coupling constant
    Coupling constant

    In physics, a coupling constant, usually denoted g, is a number that determines the strength of an interaction. Usually the Lagrangian or the Hamiltonian mechanics of a system can be separated into a kinetic part and an interaction part....
  • Frequency classification of plasmas
    Frequency classification of plasmas

    Electrical discharges applied in a plasma source for the generation of plasma s can be classified by the frequency of the exciting field. A rough classification is:...
  • Spin spin coupling
  • Spin-orbit coupling