学习光学知识作图时,许多同学虚线实线搞不清,等角直角不注意,箭头符号容易丢。造成作图不规范。现结合例题加以说明。例1根据平面镜成像的特点。画出图1中的三角板在平面镜中成的像。 When learning to learn optical knowledge, many students do not understand the dotted solid line, do not pay attention to the right angle, the arrow symbol is easy to lose. Caused the graph to be non-standard. Now combine examples to illustrate. Example 1 is based on the characteristics of plane mirror imaging. Draw the image of the triangle in Figure 1 in the plane mirror.