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全反射（教案）范静华（河北省丰润县第二中学，０６４０００）【教学目标】１．正确理解光密介质和光疏介质２．理解光的全反射现象３．掌握临界角的概念和全反射条件４．了解全反射现象的应用５．解释自然现象【重点和难点】重点是全反射现象难点是临界角概念和全反射条...
Total reflection (teacher) Fan Jinghua (Second High School, Fengrun County, Hebei Province, 064000) [Teaching Objectives] 1. Correctly understand optical and opaque media. Understand the phenomenon of total reflection of light 3. Grasp the concept of critical angle and total reflection conditions. Understand the application of total reflection phenomenon 5. Explain the natural phenomenon [Key and Difficulties] The key is the total reflection phenomenon Difficulties are the critical angle concept and the total reflection bar...