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一、选择题1.在空气和某种介质的界面上反射和折射现象同时存在,入射、反射和折射光线相汇交于O点,如右图所示.则这种介质的折射率可能是().Asin60°sin30°;Bsin60°sin45°;Csin75°sin45°;Dsin45°sin30°2.如右图所示,ABC是1个全反射棱镜的主截面,它是等腰直角三角形.一束
First, multiple-choice questions 1. Reflections and refractions occur at the interface between air and some medium. Incident, reflected, and refracted light rays converge at point O, as shown in the right figure. The refractive index of this medium may be ().Asin60°sin30°; Bsin60°sin45°; Csin75°sin45°; Dsin45°sin30°2. As shown in the right figure, ABC is the main section of a total reflection prism. It is an isosceles right triangle.