用涟波干涉法测液体的表面张力系数

The Measurement of the Coefficient of Surface Tension with the Method of Ripples Interference

液体的表面张力，在工业上的浮选技术和液体输送技术；在教学中的流体力学等都要对它进行研究。介绍了用自制的振源、振子来激发表面波（涟波）产生干涉，从而测出液体的表面张力系数的方法。测量结果不仅具有较高的精度，而且还把力学、电子线路和光学等有关知识结合于一体。运用在教学上既能拓宽学生的知识面。

The tension of liquid surface is studied in several industrial areas,such as flotation technology and liquid technology,and in the teaching of hydromechanics and other subjects.This paper presents a method of using self made vibration source and vibrometer to excitc surface waves (ripples) to produce interference.Thus,the coefficient of liquid surface tension is measured.The result of the measurement is not only more accurate,but also integrates other relevant knowledge of mechanics,electron circuit and optics.Its application not only broadens students range of knowledge but also their comprehensive abilities.