游标卡尺的读数是高中物理学习的一个难点,这里介绍另一种读数方法。常规的读法,首先是明确卡尺的精度。卡尺的精度有三种:0.1毫米、0.05毫米、0.02毫米。读数时,先读出游标尺0刻度前主尺所对的刻度值l_0,然后再看游标尺的第n(0除外)条刻度与主尺的某一刻度对齐,那么所测得的长度以毫米为单位就是:l_0+n×精度。 Vernier caliper readings are a difficult part of high school physics learning. Here is another reading method. The usual way of reading is to first clarify the accuracy of the calipers. There are three kinds of precision caliper: 0.1 mm, 0.05 mm, 0.02 mm. When reading, first read the scale value of the main ruler before the vernier 0 scale l_0, and then see the scale of the n (0 excluded) scale of the vernier aligns with a scale of the main ruler, then the measured length is in millimeters The unit is: l_0+n×accuracy.