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你了解什么叫“光的折射”吗?你能直接读出“光的入射角和折射角”的大小吗?在初中课本《光的折射》这一课中,由于对光“从空气进入水中”或“从水中进入空气”的折射规律描述较困难,也没有直观的教具,因此表述的难度较大,涉及到的内容也多。就拿全国统编物理教材来说,当时就采用了长方形的“全反射”演示器,但它的入射点都是不固定的,也没有法线作为背景衬托。在现用的上教版《物理》教材中第60页,图4-3所示的实验装置,应该说是个比较理想的教具,但也缺少可读刻度。在即将普及的二期教改的《物理》教材中也仅用了定性的图示方法来表示:光“从空气进入水中”及“从水
Do you understand what is called “reflection of light”? Can you directly read the size of the “angle of incidence and refraction of light”? In the junior high school textbook “Reflection of Light” in this lesson, because of the “light from the air into the water The description of the refraction law of ”or “into the air from the water” is more difficult and there is no intuitive teaching aid, so the description is more difficult and involves more content. Take the national textbook of physics textbooks for reference, a rectangular “total reflection” demonstrator was used at the time, but its incident points were not fixed and there was no normal line as background. The experimental apparatus shown in Fig. 4-3 in the current textbook “Physics”, page 60, should be said to be an ideal teaching aid, but it also lacks a readable scale. In the “Physics” teaching materials of the soon-to-be universal second-grade education reform, only qualitative pictorial methods are used to represent: Light “from the air into the water” and "from the water