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取一个洗脸盆,装满水。用电扇吹水面,使它产生波浪。然后,滴入少许葵花子油,可发现,在光亮的油斑范围内,波动明显减弱。这是什么原因呢?你想必注意过,茶水表面有时会浮着一层约略
Take a wash basin filled with water. Use a fan to blow water to make it wave. Then, drip a little sunflower oil, you can find that in the bright oil spots within the scope of fluctuations significantly weakened. What is the reason? You must have noticed that the surface of tea sometimes floats a layer of rough