我们一向很重视物理实验课的教学,在实验课中也同样注意向学生讲清物理原理。本学期高一新生上第二堂物理课就开始做实验——游标卡尺和千分尺的使用。实验前,我下班辅导学生预习这两个实验时,发现他们对于零误差的正负,以及用零误差去修正被测长度时,应该加还是减等问题弄不清楚。究其原因,第一是教材中没有指出千分尺零误差正负的记法和数据的修正方法;第二,教材337页倒数第五行氏··…零误差为负,我们可以在测出 We have always attached great importance to the teaching of physics experiments. We also pay attention to explaining the principles of physics to students in the experiment class. The first semester of this semester started the experiment on the second physics class—the use of vernier caliper and micrometer. Before the experiment, I used to guide the students to prepare for these two experiments and found that they were not clear about whether the zero error was positive or negative or whether the correction should be made with zero error to correct the measured length. The reason for this is that the first is that the textbook does not indicate the zero and the positive zero of the micrometer and the method of data correction; second, the 337th page of the teaching material is the fifth to the bottom.... The zero error is negative and we can measure it.