肥皂泡的光学和力学性质

摘要

Some basic physical properties of soap bubble were studied from the optical ,mechanical and thermal point of view to broaden the teaching ideas of university physics experiments .The refrac-tive index and thickness of the soap bubble w ere accurately measured using optical interference princi-ple and then its mass w as determined using the force balance principle .T he surface tension coefficient of the soap bubble was achieved using pull-off method;the surface free energy and the pressure differ-ence inside and outside the soap bubble were calculated .%从光学、力学、热学角度对肥皂泡的基本物理性质进行了实验研究，应用光学干涉原理实现对肥皂泡折射率及厚度较精确测量，并利用受力平衡原理求体积一定的肥皂泡的质量，再利用拉脱法测量肥皂液表面张力系数，进而研究肥皂泡表面自由能和内外压强差等。