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一、巧用比例直接了当例1.绿光在水中的波长和紫光在真空中的波长相等,水对绿光的折射率为4/3,则绿光的频率与紫光的频率之比是 A.4/3 B.1 C.3/4 D.16/9 分析作答:作比例选择题的常用方法是:在弄清楚题意的基础上,选择合适的物理规律,写出所求物理量
First, the clever use of the ratio is straightforward. Example 1. The wavelength of green light in water is the same as the wavelength of purple light in vacuum. The refractive index of water to green light is 4/3. The ratio of the frequency of green light to the frequency of violet light is A.4/3 B.1 C.3/4 D.16/9 Analysis Answer: The common method for making proportional multiple-choice questions is: on the basis of clarifying the meaning of the questions, choose appropriate physical laws and write out the required physical quantities.