Planckova konstanta h je jedna ze základních fyzikálních konstant. Jako fyzikální veličina má rozměr momentu hybnosti nebo akce.Planckova konstanta byla poprvé zavedena Maxem Planckem, po němž nese jméno, jako konstanta vyzařovacího zákona černého tělesa.

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  • Planckova konstanta h je jedna ze základních fyzikálních konstant. Jako fyzikální veličina má rozměr momentu hybnosti nebo akce.Planckova konstanta byla poprvé zavedena Maxem Planckem, po němž nese jméno, jako konstanta vyzařovacího zákona černého tělesa.
  • Stała Plancka (oznaczana przez h) jest jedną z podstawowych stałych fizycznych. Ma wymiar działania, pojawia się w większości równań mechaniki kwantowej.Historycznie stała Plancka pojawiła się w pracy Maxa Plancka na temat wyjaśnienia przyczyn tzw. katastrofy w nadfiolecie w prawie promieniowania ciała doskonale czarnego. Planck stwierdził, że energia nie może być wypromieniowywana w dowolnych ciągłych ilościach, a jedynie w postaci "paczek" (kwantów) o wartości hν, gdzie ν jest częstotliwością.Stała Plancka w układzie SI jest równa: h = 6,626 069 57(29)·10–34 J·s = 4,135 667 516(91)·10–15 eV·s↑
  • プランク定数(プランクていすう、プランクじょうすう、英語: Planck's constant)は、量子論を特徴付ける物理定数である。量子力学の創始者の一人であるマックス・プランクにちなんで命名された。SI単位では J s である。記号は Hilfsgröße の頭文字を取ってh と記される(Hilfs =補助、größe =大きさ、量)。
  • In meccanica quantistica, la costante di Planck, anche detta quanto d'azione e indicata con h è una costante fisica il cui valore è equivalente alla quantità d'azione fondamentale, e determina la distanza tra i valori assunti dai quanti delle grandezze fisiche fondamentali. Ha le dimensioni di un'energia per un tempo, e nel sistema di unità di misura delle unità atomiche rappresenta l'unità di misura del momento angolare.La costante di Planck permette la quantizzazione di grandezze come l'energia, la quantità di moto e il momento angolare, e la sua scoperta ha avuto un ruolo determinante per la nascita e la successiva evoluzione della meccanica quantistica. La costante prende il nome da Max Planck, che la introdusse in seguito agli studi sullo spettro della radiazione di corpo nero.
  • The Planck constant (denoted h, also called Planck's constant) is a physical constant that is the quantum of action in quantum mechanics. Published in 1900, it originally described the proportionality constant between the energy (E) of a charged atomic oscillator in the wall of a black body, and the frequency (ν) of its associated electromagnetic wave. Its relevance is now integral to the field of quantum mechanics, describing the relationship between energy and frequency, commonly known as the Planck relation:In 1905 the value (E), the energy of a charged atomic oscillator, was theoretically associated with the energy of the electromagnetic wave itself, representing the minimum amount of energy required to form an electromagnetic field (a "quantum"). Further investigation of quanta revealed behaviour associated with an independent unit ("particle") as opposed to an electromagnetic wave and was eventually given the term photon. The Planck relation now describes the energy of each photon in terms of the photon's frequency. This energy is extremely small in terms of ordinary experience.Since the frequency , wavelength λ, and speed of light c are related by λν = c, the Planck relation for a photon can also be expressed asThe above equation leads to another relationship involving the Planck constant. Given p for the linear momentum of a particle (not only a photon, but other particles as well), the de Broglie wavelength λ of the particle is given byIn applications where frequency is expressed in terms of radians per second ("angular frequency") instead of cycles per second, it is often useful to absorb a factor of 2π into the Planck constant. The resulting constant is called the reduced Planck constant or Dirac constant. It is equal to the Planck constant divided by 2π, and is denoted ħ (or "h-bar", as it is often also called):The energy of a photon with angular frequency ω, where ω = 2πν, is given byThe reduced Planck constant is the quantum of angular momentum in quantum mechanics.The Planck constant is named after Max Planck, the founder of quantum theory, who discovered it in 1900, and who coined the term "Quantum". Classical statistical mechanics requires the existence of h (but does not define its value). Planck discovered that physical action could not take on any indiscriminate value. Instead, the action must be some multiple of a very small quantity (later to be named the "quantum of action" and now called Planck constant). This inherent granularity is counterintuitive in the everyday world, where it is possible to "make things a little bit hotter" or "move things a little bit faster". This is because the quanta of action are very, very small in comparison to everyday macroscopic human experience. Hence, the granularity of nature appears smooth to us.Thus, on the macroscopic scale, quantum mechanics and classical physics converge at the classical limit. Nevertheless, it is impossible, as Planck discovered, to explain some phenomena without accepting the fact that action is quantized. In many cases, such as for monochromatic light or for atoms, this quantum of action also implies that only certain energy levels are allowed, and values in-between are forbidden. In 1923, Louis de Broglie generalized the Planck relation by postulating that the Planck constant represents the proportionality between the momentum and the quantum wavelength of not just the photon, but the quantum wavelength of any particle. This was confirmed by experiments soon afterwards.
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  • Planckova konstanta h je jedna ze základních fyzikálních konstant. Jako fyzikální veličina má rozměr momentu hybnosti nebo akce.Planckova konstanta byla poprvé zavedena Maxem Planckem, po němž nese jméno, jako konstanta vyzařovacího zákona černého tělesa.
  • プランク定数(プランクていすう、プランクじょうすう、英語: Planck's constant)は、量子論を特徴付ける物理定数である。量子力学の創始者の一人であるマックス・プランクにちなんで命名された。SI単位では J s である。記号は Hilfsgröße の頭文字を取ってh と記される(Hilfs =補助、größe =大きさ、量)。
  • The Planck constant (denoted h, also called Planck's constant) is a physical constant that is the quantum of action in quantum mechanics. Published in 1900, it originally described the proportionality constant between the energy (E) of a charged atomic oscillator in the wall of a black body, and the frequency (ν) of its associated electromagnetic wave.
  • Stała Plancka (oznaczana przez h) jest jedną z podstawowych stałych fizycznych. Ma wymiar działania, pojawia się w większości równań mechaniki kwantowej.Historycznie stała Plancka pojawiła się w pracy Maxa Plancka na temat wyjaśnienia przyczyn tzw. katastrofy w nadfiolecie w prawie promieniowania ciała doskonale czarnego.
  • In meccanica quantistica, la costante di Planck, anche detta quanto d'azione e indicata con h è una costante fisica il cui valore è equivalente alla quantità d'azione fondamentale, e determina la distanza tra i valori assunti dai quanti delle grandezze fisiche fondamentali.
rdfs:label
  • Constante de Planck
  • Constant de Planck
  • Constante de Planck
  • Constante de Planck
  • Constante van Planck
  • Costante di Planck
  • Konstanta Planck
  • Planck constant
  • Planck sabiti
  • Planck-állandó
  • Planckova konstanta
  • Plancksches Wirkungsquantum
  • Stała Plancka
  • Константа на Планк
  • Постоянная Планка
  • プランク定数
  • 플랑크 상수
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