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1问题的产生物理教师给同学们提出了一个传统的光学问题:一束太阳光与水平面成40°角的方向射来,要使反射光线沿水平方向射出,平面镜与水平面成多少度角摆放?在对问题的解答中,出现了如下情况:甲:70°,乙:20°,丙:有多种可能,……哪一个正确?在讨论中,同学们画出了70°,20°的的图示(如上图),对于丙同学的意见,大家认为,在反射光照中,我们经常改变光线的路
1 The Problem of Physics Physics teachers proposed to students a traditional optical problem: a bunch of sunlight collides with the horizontal plane at an angle of 40 ° so that the reflected light will be emitted in the horizontal direction. How many degrees of plane mirror should be placed at the horizontal plane? In the answer to the question, the following situation occurred: A: 70 °, B: 20 ° C: There are many possibilities, ... Which one is correct? During the discussion, the students drew 70 °, 20 ° (Pictured above). For the suggestion of classmate C, we think that in the reflected light, we often change the way of light