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九年义务教育三年制初级中学教科书《物理》第一册第五章７９页习题４谈到：“玻璃是透光的，镜子却能很好的反射光，为什么？找一块破镜片，刮去它背面的部分涂层，这部分还能照出像来吗？镜子是靠什么来反射光靠什么来反射光的？”在与教材配套的《教师教学用书》中所给答案
Nine-year Compulsory Education Three-year Primary School Textbook “Physics” Volume I Chapter 5 Page 79 Problem 4: “The glass is transparent, but the mirror can reflect light well. Why? Find a broken lens, scrape Go to the back of the part of the coating, this part can still shine like it? The mirror is to rely on what to reflect the light on what to reflect light?” In the teaching materials supporting the “Teacher’s Guide to teaching” to give the answer