一、教材中的插图按照教育部颁布的《义务教育物理课程标准(2011年版)》编写的苏科版教科书八年级上册第72页内容是这样的:镜面反射与漫反射在暗室里,将一个小平面镜放在一张较大的白纸上,用手电筒正对着镜面照射,从侧面看去,镜面和白纸哪个显得更亮?通过实验你会发现:镜面看起来是暗的,而白纸反而比镜面亮一些。这是为什么呢? First, the illustrations in the textbook In accordance with the “Compulsory Education Physics Curriculum Standard (2011 Edition)” issued by the Ministry of Education, Su Ke edition of the eighth grade of the textbook on page 72 content is this: specular reflection and diffuse reflection in the dark room, a The facet mirror is placed on a large piece of white paper and illuminated with a flashlight facing the mirror. Looking from the side, which mirror and white paper appear brighter? You will find out through the experiment that the mirror looks dark and that the white Paper on the contrary brighter than the mirror. Why is this?