Photoelectric Effect (Cesium)
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://chemfyi.com/iframe/entity//" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://chemfyi.com/entity//Add a dynamic SVG badge to your README or docs.
[](https://chemfyi.com/entity//)Use the native HTML custom element.
Cs + hν → Cs+ + e−
概述
Photons with energy exceeding the work function of cesium (2.1 eV, wavelength < 590 nm) eject electrons from the metal surface. Cesium has the lowest work function of any stable element, making it the most photosensitive metal. Einstein's explanation of this effect in 1905 established the quantum nature of light and won him the Nobel Prize.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 反应物 | Cesium Cs | 1 | (s) |
日常示例
Automatic doors use photoelectric sensors that detect when a person blocks a light beam, triggering the door to open.
工业重要性
光电效应是光电管、光电倍增管、CCD传感器和太阳能电池的工作原理，推动了现代光电子工业发展。
属性
- 可逆
- 否
- 能量
- 吸热