Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Electromagnetic Fields01:30

Electromagnetic Fields

2.3K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
2.3K
Energy Carried By Electromagnetic Waves01:22

Energy Carried By Electromagnetic Waves

3.2K
Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes, this energy is obvious, such as in the summer sun's warmth. At other times, it is subtle, such as the unfelt energy of gamma rays, which can destroy living cells. Electromagnetic waves bring energy into a system through their electric and magnetic fields. These fields can exert forces and move charges in the system and, thus, do work on them. However, there is energy in an electromagnetic wave,...
3.2K
Energy In A Magnetic Field01:24

Energy In A Magnetic Field

2.4K
If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
2.4K
Plane Electromagnetic Waves II01:29

Plane Electromagnetic Waves II

3.7K
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.
3.7K
Dual Nature of Electromagnetic (EM) Radiation01:10

Dual Nature of Electromagnetic (EM) Radiation

2.5K
Electromagnetic (EM) radiation consists of electric and magnetic field components oscillating in planes perpendicular to each other and mutually perpendicular to radiation propagation through space. EM radiation can be classified as a wave, characterized by the properties of waves such as wavelength (denoted as λ) and frequency (represented by ν).
Wavelength is the distance between two consecutive peaks (the highest point) or troughs (the lowest point) in the wave. Frequency is the...
2.5K
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

4.4K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
4.4K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Direct observations of cross-scale energy transfer driven by multiple-ion interactions in space plasmas.

Nature communications·2025
Same author

Interstellar Mapping And Acceleration Probe: The NASA IMAP Mission.

Space science reviews·2025
Same author

Charged Particle Cross-Field Transport due to Geometric Jumps of Adiabatic Invariant.

Physical review letters·2025
Same author

Detection of ultrafast electron energization by whistler-mode chorus waves in the magnetosphere of Earth.

Scientific reports·2025
Same author

The variable source of the plasma sheet during a geomagnetic storm.

Nature communications·2023
Same author

Energetic Electron Precipitation Driven by Electromagnetic Ion Cyclotron Waves from ELFIN's Low Altitude Perspective.

Space science reviews·2023

関連する実験動画

Updated: Sep 25, 2025

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

9.2K

再接続フロントにおける電磁エネルギー変換

V Angelopoulos1, A Runov, X-Z Zhou

  • 1Department of Earth, Planetary and Space Sciences and Institute of Geophysics and Planetary Physics, University of California Los Angeles, Los Angeles, CA 90095-1567, USA. vassilis@ucla.edu

Science (New York, N.Y.)
|September 28, 2013
PubMed
まとめ
この要約は機械生成です。

科学者たちは,地球の磁気尾にエネルギー変換が行われる場所を発見しました. このプロセスは,オーロラと放射線帯にとって極めて重要であり,磁気流動フロントで発生し,太陽風のエネルギーを粒子エネルギーに変換します.

さらに関連する動画

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
07:17

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

12.8K
Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
11:30

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

11.8K

関連する実験動画

Last Updated: Sep 25, 2025

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

9.2K
Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
07:17

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

12.8K
Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
11:30

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

11.8K

科学分野:

  • 宇宙物理学 宇宙物理学
  • プラズマ物理学 プラズマ物理学
  • 地質物理学 地質物理学とは地質物理学です.

背景:

  • 地球の磁気尾は太陽風のエネルギーを貯蔵しています.
  • 磁気尾のエネルギー変換は,オーロラと放射線帯を動かす.
  • このエネルギー変換の正確な位置は,以前は知られていなかった.

研究 の 目的:

  • 地球の磁気尾の電磁エネルギー変換の位置とメカニズムを特定する.
  • 太陽風のエネルギーがどのように粒子エネルギーに変換されるかを理解する.

主な方法:

  • 8つの宇宙船からの調整された観測を活用した.
  • 地磁気活動の間隔から分析されたデータ.
  • 研究された磁気流のフロントと関連する電流.

主要な成果:

  • エネルギー変換は,最近再接続された磁気流のフロント内で起こります.
  • この変換は,主に1〜10電子の慣性長度スケールで起こります.
  • 強い電流のシート (数十から数百nA/m2) は,このプロセスに関連しています.
  • 再接続のアウトフローフルーツフロントは,約10〜100GW/R_Earthの電力を変換します.

結論:

  • この研究では,磁気尾のエネルギー変換の主要な場所として,再接続の流出フクロスフロントを特定しています.
  • この変換メカニズムは,局所的な磁気流量輸送と,グローバルな磁気尾流量減少と一致しています.
  • 発見は,宇宙天候現象を駆動する重要なプロセスを明確にします.