主要贊助單位
Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time.
National Science Foundation
An independent federal agency created by Congress in 1950 to promote the progress of science.
King Saud University seeks to become a leader in educational and technological innovation, scientific discovery and creativity through fostering an atmosphere of intellectual inspiration and partnership for the prosperity of society.
The O'Donnell Foundation is devoted to building model programs to enhance the quality of education.
電荷輻射
The electric field lines from a point charge evolve in time as the charge moves. Watch radiation propagate outward at the speed of light as you wiggle the charge. Stop a moving charge to see bremsstrahlung (braking) radiation. Explore the radiation patterns as the charge moves with sinusoidal, circular, or linear motion. You can move the charge any way you like, as long as you don’t exceed the speed of light.
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教學資源
主要課程
- Electromagnetic Radiation
- Dipole Radiation
- 電場
- Speed of Light
學習目標
- How the radial field line density depends on the speed of a charge in linear motion (compression of field lines).
- How the anisotropy of the field pattern depends on sinusoidal vs. circular motion.
- How the applied force and motion are related in relativistic dynamics (constant force does not result in faster-than-light travel).
- How acceleration produces transverse fields, while constant velocity produces radial fields.
- For sinusoidal motion, which produces dipole radiation, the field lines evolve from radial and static-like nearby, to transverse and plane-wave-like far away.
- How sudden deceleration of a charge produces bremsstrahlung (braking) radiation.
教學點子
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相關的模擬教學
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| 語言 | 語言 (已翻譯) | 模擬教學主題 | ||
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| 丹麥語 | Dansk | Udstrålende ladning | 開 始 | 下 載 |
| 巴斯克語 | Basque | Karga-Erradiatzailea | 開 始 | 下 載 |
| 匈牙利語 | magyar | Sugárzó töltés | 開 始 | 下 載 |
| 西班牙語 | español | Carga Radiante | 開 始 | 下 載 |
| 西班牙語 (秘魯) | español (Perú) | Carga Radiante | 開 始 | 下 載 |
| 希伯來語 | עברית | מטען קורן | 開 始 | 下 載 |
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| 英語 | English | Radiating Charge | 開 始 | 下 載 |
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| 荷蘭語 | Nederlands | Radiating Charge | 開 始 | 下 載 |
| 越南語 | Tiếng Việt | Điện tích bức xạ | 開 始 | 下 載 |
| 塞爾維亞文 | Српски | Зрачење наелектрисања у кретању | 開 始 | 下 載 |
| 義大利語 | italiano | Carica radiante | 開 始 | 下 載 |
| 韓語 | 한국어 | 방사 충전 | 開 始 | 下 載 |
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軟體需求
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Microsoft Windows
XP/Vista/7 Macromedia Flash 9 or later |
OS 10.5 or later
Macromedia Flash 9 or later |
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榮譽榜
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