Long Wavelength Limit

Long Wavelength Limit

In electricity and magnetism, the long wavelength limit is the limiting case when the wavelength is much larger than the system size. This corresponds to the quasi-static case, and reduces to electrostatics and magnetostatics.

The physical criterion is that lambda >> a, where a is the size of the system. The following statements are all equivalent:
* lambda >> a
* ka << 1, where k is the wave vector
* frac{omega}{c}a << 1, where omega is the angular frequency, c is the propagation speed of waves.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Electromagnetic spectrum — The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation frequencies. [cite web|url=http://imagine.gsfc.nasa.gov/docs/dict ei.html#em spectrum|title=Imagine the Universe! Dictionary] The electromagnetic spectrum… …   Wikipedia

  • Phonon — For KDE Software Compilation 4 s multimedia framework, see Phonon (KDE). Normal modes of vibration progression through a crystal. The amplitude of the motion has been exaggerated for ease of viewing; in an actual crystal, it is typically much… …   Wikipedia

  • Supergravity — In theoretical physics, supergravity (supergravity theory) is a field theory that combines the principles of supersymmetry and general relativity. Together, these imply that, in supergravity, the supersymmetry is a local symmetry (in contrast to… …   Wikipedia

  • ГОСТ 21934-83: Приемники излучения полупроводниковые фотоэлектрические и фотоприемные устройства. Термины и определения — Терминология ГОСТ 21934 83: Приемники излучения полупроводниковые фотоэлектрические и фотоприемные устройства. Термины и определения оригинал документа: 12. p i n фотодиод D. Pin Photodiode E. Pin Photodiode F. Pin Photodiode Фотодиод, дырочная и …   Словарь-справочник терминов нормативно-технической документации

  • Dichromatism — For colour blindness, see Dichromacy. Dichromatism (or polychromatism) is a phenomenon where the hue of the colour in materials or solutions are dependent on both the concentration of the absorbing substance and the depth or thickness of the… …   Wikipedia

  • Ion acoustic wave — An ion acoustic wave is a longitudinal oscillation of the ions (and the electrons) much like acoustic waves traveling in neutral gas. However, because the waves propagate through positively charged ions, ion acoustic waves can interact with their …   Wikipedia

  • длинноволновая граница спектральной чувствительности ФЭПП — Наибольшая длина волны монохроматического излучения, при которой монохроматическая чувствительность ФЭПП равна 0,1 ее максимального значения. Обозначение λ’’ λS2 [ГОСТ 21934 83] Тематики приемники излуч. полупроводн. и… …   Справочник технического переводчика

  • Длинноволновая граница спектральной чувствительности ФЭПП — 86. Длинноволновая граница спектральной чувствительности ФЭПП D. Langwellengrenze E. Long wavelength limit λ Наибольшая длина волны монохроматического излучения, при которой монохроматическая чувствительность ФЭПП равна 0,1 ее максимального… …   Словарь-справочник терминов нормативно-технической документации

  • Cnoidal wave — US Army bombers flying over near periodic swell in shallow water, close to the Panama coast (1933). The sharp crests and very flat troughs are characteristic for cnoidal waves. In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic… …   Wikipedia

  • Ising model — The Ising model, named after the physicist Ernst Ising, is a mathematical model in statistical mechanics. It has since been used to model diverse phenomena in which bits of information, interacting in pairs, produce collectiveeffects.Definition… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”