Conservation law

In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves.

One particularly important physical result concerning conservation laws is Noether's Theorem, which states that there is a one-to-one correspondence between conservation laws and differentiable symmetries of physical systems. For example, the conservation of energy follows from the time-invariance of physical systems, and the fact that physical systems behave the same regardless of how they are oriented in space gives rise to the conservation of angular momentum.

A partial listing of conservation laws that are said to be exact laws, or more precisely have never been shown to be violated:

There are also approximate conservation laws. These are approximately true in particular situations, such as low speeds, short time scales, or certain interactions.

See also

References

  • Victor J. Stenger, 2000. Timeless Reality: Symmetry, Simplicity, and Multiple Universes. Buffalo NY: Prometheus Books. Chpt. 12 is a gentle introduction to symmetry, invariance, and conservation laws.

External links


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  • conservation law — Physics, Chem. any law stating that some quantity or property remains constant during and after an interaction or process, as conservation of charge or conservation of linear momentum. [1945 50] * * * conservation law noun (physics) A law that… …   Useful english dictionary

  • conservation law — tvermės dėsnis statusas T sritis fizika atitikmenys: angl. conservation law; law of conservation vok. Erhaltungsgesetz, n; Erhaltungssatz, m rus. закон сохранения, m pranc. loi de conservation, f …   Fizikos terminų žodynas

  • conservation law — Physics, Chem. any law stating that some quantity or property remains constant during and after an interaction or process, as conservation of charge or conservation of linear momentum. [1945 50] * * * or law of conservation In physics, the… …   Universalium

  • conservation law — conserva′tion law n. phs chem. any physical law stating that a quantity or property remains constant during and after an interaction or process …   From formal English to slang

  • conservation law — noun Any of several laws that hold that some physical property remains constant in a closed system regardless of other changes that take place …   Wiktionary

  • conservation-law — adjective noun …   Wiktionary

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  • charge conservation law — krūvio tvermės dėsnis statusas T sritis fizika atitikmenys: angl. charge conservation law; law of conservation of electric charge vok. Erhaltungssatz der elektrischen Ladung, m; Ladungserhaltungssatz, m rus. закон сохранения заряда, m; закон… …   Fizikos terminų žodynas

  • momentum conservation law — judesio kiekio tvermės dėsnis statusas T sritis fizika atitikmenys: angl. momentum conservation law; principle of conservation of linear momentum; principle of conservation of momentum vok. Erhaltungssatz der Bewegungsgröße, m;… …   Fizikos terminų žodynas

  • energy conservation law — energijos tvermės dėsnis statusas T sritis fizika atitikmenys: angl. energy conservation law vok. Energieerhaltungssatz, m; Energiesatz, m rus. закон сохранения энергии, m pranc. loi de conservation d’énergie, f …   Fizikos terminų žodynas

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