1．School of Science，Xi'an Polytechnic University，Xi'an 710048，China，2．Frontiers Science Center for Flexible Electronics，Xi'an Institute of Flexible Electronics (IFE)and Northwestern Polytechnical University，Xi'an 710072，China
Abstract: Through optimizing the experimental method，an experiment for measuring the liquid surface tension coefficient using a Jolly balance based on the light lever principle is designed．A novel light lever measurement device is developed via the light lever method and the pulling-off method，featuring a circular scale reading mechanism for convenient data recording． This device abandons the complicated " three-line alignment" operation，addressing long-standing issues in traditional Jolly balances such as cumbersome procedures and significant human errors．Practical verification shows that this measurement method is easy to operate，highly repeatable，and achieves high data precision．Meanwhile，its intuitive reading mechanism enhances the device's usability and practical applicability．
李梦阳, 卢定泽, 宋毅哲, 侯鸿儒, 方宇杰 . 基于光杠杆原理的焦利氏秤测量液体表面张力系数[J]. 大学物理实验, 2025, 38(5): 28-33.
LI Mengyang, LU Dingze , SONG Yizhe , HOU Hongru , FANG Yujie . Measurement of the Liquid Surface Tension Coefficient Using a Jolly Balance Based on the Light Lever Principle. Physical Experiment of College, 2025, 38(5): 28-33.
