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光的直线传播实验。点燃速燃蚊香,让手电筒的光通过烟雾,能较好演示光的直线传播路径。光的折射规律推导实验。如图1,用一个小手电筒、铁架台、铁夹、蓝色塑料杯,把电筒安装在铁架台上,斜对着塑料杯,打开开关,使电筒的光射在杯的内侧,可以观察到塑料杯外侧有一个光亮的点A(贴上标签),加入适量水后,(由于发生折射)光亮的点下移到B点(贴上标签),作出此时的光路图并分析,得到结论:折射光线、入射光线分居在法线的两侧,折射角小于入射角。保持入射点不变。把电筒往法线靠近,光亮
Light linear propagation experiment. Ignite the quick-burning mosquito-repellent incense and let the light of the flashlight pass through the smoke, which can better demonstrate the straight path of light. The refraction law of light deduces the experiment. As shown in Figure 1, with a small flashlight, iron stand, iron clip, blue plastic cup, the flashlight is installed on the iron stand, diagonally facing the plastic cup, and the switch is opened so that the light of the flashlight is shot inside the cup and can be observed. There is a bright point A (labeled) on the outside of the plastic cup. After adding the appropriate amount of water, the bright point moves to point B (by attaching a label) due to refraction. The light path diagram at this time is then analyzed and analyzed. : Refraction rays, incident rays are separated on both sides of the normal, and the refraction angle is smaller than the incident angle. Keep the incident point unchanged. Bring the flashlight closer to normal, bright