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关于折射率的几何光学题是近年的高考热点,难度不太大,灵活性较强。解题时要把折射率的四个表达式n=(sin i)/(sin r),n=1/(sin C)(发生全反射时,C为临界角),n=c/v,n=λ_0/λ和作图有机地结合起来,根据数据计算反射角、折射角,算一步画一步,画一步再根据需要算一步。作图要依据计算结果,力求准确。下面举例分析。
Geometrical optics on the refractive index problem is hot college entrance examination in recent years, not too difficult, more flexible. The four expressions of the refractive index n = (sin i) / (sin r), n = 1 / (sin C) (when the total reflection occurs, C is the critical angle), n = c / v, n = λ_0 / λ and organic combination of mapping, calculated according to the data of the reflection angle, refraction angle, step by step, draw one step and then count as needed. Drawing to be based on the calculation results, and strive to be accurate. The following example analysis.