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一、填空题(共40分,第l,2小题各2分,其余每/』、题4分) 1.一束15f{光射至地商,与地面成60。角,要使反射光线中行下地面,则平面镜跟地嘶的支角应为 2.PQ是空气和玻璃的界面,光线从空气射入玻璃巾,I和Ⅱ表示两种媒质,则入射角为 ,图中玻璃是释’啊 3.0j卅卜列能的转化情况: ‘ ①
First, fill in the blanks (a total of 40 points, the first two questions, 2 points, the remaining each / 』, the title of 4 points) 1. A bundle of 15f {light hit the ground, with the ground into 60. Angle, in order to make the reflection of light from the ground to the ground, then the plane mirror and mantle angle should be 2. PQ is the interface of air and glass, light from the air into the glass towel, I and II said two media, the incident angle is , The glass in the picture is the interpretation of the conversion of ’Ah 3.0j 卅 列 列:’ 1