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当前,中学物理实验室虽然配备了“光的反射定律”实验器材,但笔者认为该器材至少存在以下几点不足之处:一是该器材只能探究“光的反射定律”中的两个内容:首先,反射光线、入射光线分居在法线两侧;其次,反射角等于入射角,但无法探究反射光线、入射光线、法线在同一平面上,这是因为实验室配备的器材是一块完整的铁板,它无法向前、向后翻折。二是该器材比较笨重,作为演示实验器材使用起来不方便;同时,可见度不高,不利于学生观察其实
At present, the Physics Laboratory of Middle School is equipped with “Light Reflection Law ” experimental equipment, but I think the equipment at least the following deficiencies: First, the equipment can only explore “light reflection law ” First, the reflected light and the incident light are separated on both sides of the normal. Secondly, the reflection angle is equal to the incident angle, but the reflected light, the incident light and the normal line can not be explored on the same plane. This is because the laboratory is equipped with Equipment is a complete iron plate, it can not be folded forward and backward. Second, the equipment is bulky, as a demonstration of experimental equipment is not easy to use; the same time, visibility is not high, is not conducive to students to observe the fact