少数点和线组成的图形,叫做简图,如数轴、力的图示、光路图等.人们常用简图来表示某些物理量的大小、或者展示物理事件的时空关系或内部结构.与此同时,绘制简图还能够培养同学的空间想象,图形表达、比较分析等多方面的能力。通过绘制简图来完成作图题,或辅助解析问答题与计算题,是常用的解题方法技巧之一. The figures composed of a few dots and lines are called sketch maps, such as axes, force diagrams, light path diagrams, etc. People often use diagrams to represent the size of certain physical quantities, or to show the time-space relationships or internal structures of physical events. At the same time , Drawing a diagram can also cultivate the students’ spatial imagination, graphic expression, comparative analysis and other aspects. Completing drawing questions by drawing diagrams, or assisting in analyzing essay questions and calculation questions, is one of the commonly used problem solving techniques.