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高中物理(甲本)第二册第六章第四节:引入电力线来形象地描述电场。做好“电力线”的演示实验,对实现教学目标十分重要。按课本介绍:把奎宁晶针放入篦麻油里……。本人曾多次沿此法去做,材料、装置,均难以解决。效果也不理想。
High school physics (Kabmoto) Volume II Chapter 6 Section 4: Introduce power lines to visually describe electric fields. Doing a good demonstration of the “power line” is very important for achieving teaching goals. According to the textbook description: Put the quinine crystal needle into castor oil... I have used this method several times to do it. Materials and devices are difficult to solve. The effect is also not ideal.