论文部分内容阅读
锡箔纸是一种常见的食品包装材料。食品有了锡箔纸的保护,味道就不会受环境的影响而发生变化,保质期就会延长。锡箔纸的主要成分是锡、铝,因此锡箔纸具有良好的导电、导热性能;锡箔纸还有很好的光洁度和光、热的反射性;锡箔纸的厚度仅有几十微米,质地很轻。笔者巧妙地利用锡箔纸这些物理特性创新和改进初中物理中的一些实验,在实际教学过程中获得了意想不到的效果。
Foil is a common food packaging material. With the protection of food foil, the taste will not be affected by the environment changes, the shelf life will be extended. The main component of the foil is tin, aluminum, so the foil has good electrical conductivity, thermal conductivity; foil foil also has a good finish and light, thermal reflectivity; foil thickness of only a few tens of microns, the texture is very light. The author skillfully makes use of the physical properties of tinfoil to innovate and improve some experiments in junior middle school physics and has obtained unexpected results in the actual teaching process.