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関連する概念動画

The Electromagnetic Spectrum02:37

The Electromagnetic Spectrum

The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
Precipitation of Ions03:11

Precipitation of Ions

Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The Electromagnetic Spectrum01:24

The Electromagnetic Spectrum

Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
Plane Electromagnetic Waves I01:30

Plane Electromagnetic Waves I

The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
The EM field is assumed to be a...
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
Standing Electromagnetic Waves01:15

Standing Electromagnetic Waves

Electromagnetic waves can be reflected; the surface of a conductor or a dielectric can act as a reflector. As electric and magnetic fields obey the superposition principle, so do electromagnetic waves. The superposition of an incident wave and a reflected electromagnetic wave produces a standing wave analogous to the standing waves created on a stretched string.
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...

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関連する実験動画

Updated: May 11, 2026

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

雷雲とイオノスフィアの間の巨大なジェットです.

H T Su1, R R Hsu, A B Chen

  • 1Department of Physics, National Cheng Kung University, Tainan, 70148, Taiwan. htsu@phys.ncku.edu.tw

Nature
|June 27, 2003
PubMed
まとめ

巨大なジェットが雷雲とイオノスフィアを直接結びつけ,地球全体の電気回路の新しい構成要素を明らかにしています. これらの放電は,稲妻とは異なり,電気的潜在力を減少させ,大気中の電気についての理解を修正する必要が生じます.

科学分野:

  • 大気物理学 大気物理学
  • エアロノミーはエアロノミーです.
  • 電磁気学は,電磁気学である.

背景:

  • 地球の地球規模の電気回路は,通常,雷雨,イオノスフィア,電流を含む.
  • スプライトや青いジェットのような一時的な光現象は,雲とイオノスフィアの間で発生します.
  • グローバル電気回路の完全なコンポーネントは完全に理解されていませんでした.

研究 の 目的:

  • 地球のグローバルな電気回路における巨大なジェットの役割を調査するために.
  • 雷雲とイオノスフィアの間の電気的つながりを決定する.
  • これらのイベントの間に,非常に低周波のラジオ波の生成メカニズムを理解するために.

主な方法:

  • 5つの巨大なジェットイベントの観測.
  • 極低周波 (ELF) ラジオ波の検出.
  • 雲とイオノスフィアの間の大気中の電気放電の分析.

主要な成果:

  • 巨大なジェットが,雷雲 (16 km) とイオノスフィア (90 km) を直接接続していることが観察されました.
  • 非常に低周波の無線波が4つのイベントの間に検出され,雲から離子圏への負の放電を示しました.

さらに関連する動画

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
08:36

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation

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Cryogenic Liquid Jets for High Repetition Rate Discovery Science
08:34

Cryogenic Liquid Jets for High Repetition Rate Discovery Science

Published on: May 9, 2020

関連する実験動画

Last Updated: May 11, 2026

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
08:36

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation

Published on: November 3, 2016

Cryogenic Liquid Jets for High Repetition Rate Discovery Science
08:34

Cryogenic Liquid Jets for High Repetition Rate Discovery Science

Published on: May 9, 2020

  • これらの巨大なジェットイベントの前には,雲から地までの稲妻はありませんでした.

    • 結論:

    • 巨大なジェットは,世界の電気回路における重要な経路を表しています.
    • これらの放電は,イオノスフィアと地面の間の電気的潜在力を減少させます.
    • グローバルな電気回路の従来のモデルは,巨大なジェットやスプライトを含むように変更する必要があります.