“黑箱”是指内部结构不能直接观察的系统,要了解其内部结构,只能向它输入信息,再根据它的输出信息来推断,即由其“表”而知其“里”,这称做黑箱方法.如夏天挑选西瓜,可用手指弹几下(输入信息),听听发出的声音(输出信患),由此判断瓜的好坏.黑箱方法广泛应用于人口系统、环境检测和污染控制、生命系统等的研究.下面向大家介绍中学物理中的“黑箱”. “Black box” refers to a system whose internal structure cannot be directly observed. To understand its internal structure, it can only input information to it and then infer it from its output information, that is, its “table” and its “inside”. This is called Make a black box method. If you pick a watermelon in the summer, you can use a few fingers (input information) to listen to the sound (output information) to determine whether the melon is good or bad. The black box method is widely used in the population system, environmental detection and pollution Research on control, life systems, etc. The following introduces the “black box” in the middle school physics.