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人民教育出版社出版的全日制普通高级中学教科书《物理》第三册(必修加选修)第7面关于折射率定义的描述是:“物理学中把光从真空射入某种介质发生折射时,入射角θ_1的正弦与折射角θ_2的正弦之比,叫做这种介质的折射率 n”.笔者翻阅了山东科学教育出版社和人民教育出版社分别出版的普通高中课程标准实验教科书也都是这样定义的.定义中的“叫做这种介质的折射率 n”不就意味着介质的折射率 n 是介质的属性,其大小只跟介质有关跟其他物理量无关?这样定义的科学性如何?笔者对此作一探讨.
The 7th surface of the full-time ordinary high school textbook “Physics” published by the People’s Education Press (required for optional) is the description of the refractive index in the 7th aspect: “In physics, the light is injected from a vacuum into a medium to cause refraction. The ratio of the sine of the incidence angle θ_1 to the sine of the refraction angle θ_2 is called the refractive index of the medium n". The author reviewed the ordinary high school curriculum standard experimental textbooks respectively published by Shandong Science Education Press and People’s Education Press. These are all defined in this way. The “refractive index n” of this medium in the definition does not mean that the refractive index n of the medium is the property of the medium. Its size is only related to the medium and it is not related to other physical quantities. This defined science How is sex? The author makes a discussion on this.