光电效应

例句：

1. 1. The photoelectric effect is a fundamental principle in electronics.
   光电效应是电子学中的基本原理。
2. 2.The scientist discovered the photoelectric effect when he exposed a piece of metal to sunlight.
   这位科学家在将一块金属暴露于阳光下时发现了光电效应。
3. 3. The photoelectric effect has been used in many applications, including solar cells and security systems.
   光电效应已被应用于许多应用，包括太阳能电池和安全系统。