摘要
本文以测量钢丝的杨氏模量为例,在“问题导向”理念的指导下,基于“如何准确测量钢丝在特定拉力下的伸长量”这个问题,首次在同一上课时间段内,分别采用光杠杆法和光栅尺法测量同一根钢丝的杨氏模量,结果表明两种方法测量结果高度一致,误差仅为0.6%。学生在同一上课时间段内通过两种不同方法的对比,不仅能加深对问题的理解,强化问题导向,同时也有利于开阔解决问题的思路,达到培养拔尖创新人才思维模式的目的。
This paper discusses problem-oriented teaching method through a case study on the measurement of the Young’s modulus of steel wire. Based on the problem how to accurately measure the elongation of a steel wire under a specific tension, the young’s modulus of the same steel wire was measured by optical lever method and grating ruler method respectively in the same class period for the first time. The results suggest that the two methods are highly consistent with an error of 0.6% only. Through the comparison of two different methods during the same class time, it can not only deepen students’ understanding of this problem and strengthen the problem orientation, but also help to broaden their thinking of solving the problem to achieve the goal of cultivating top-notch innovative talents.
作者
王才林
邵明珍
张欢
刘丽莎
WANG Cailin;SHAO Mingzhen;ZHANG Huan;LIU Lisha(Department of Physics,School of Science,Southern University of Science and Technology,Shenzhen,Guangdong 518055;Center for Language Education,Southern University of Science and Technology,Shenzhen,Guangdong 518055)
出处
《物理与工程》
2021年第6期92-96,共5页
Physics and Engineering
基金
南方科技大学2019年教学改革项目(XJJG201911
XJJG201915)
教育部高等学校大学物理课程教学指导委员会高等学校教学研究项目(DJZW201931zn)。
关键词
杨氏模量
光杠杆法
光栅尺法
问题导向
拔尖创新人才
Young's modulus
optical lever method
grating ruler method
problem-oriented
top-notch innovative talents
