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Analysis of the experimental finals for the 35~(th) Chinese Physics Olympiad Compeition

WANG Jin-hui;YANG Wen-ming;SUN Cun-ying;WANG Yu-xing;ZHOU Hong;LIU Jia-bin;School of Physics and Astronomy,Shanghai Jiao Tong University;  
The experimental contents,test questions analysis and competition results analysis of the final test questions of the 35~(th) Chinese Physics Olympiad Competition for middle school students were introduced.The 1~(st) question was to measure the Young modulus and the refractive index of optical glass material,which could be divided into three parts:measuring the wavelength of semiconductor laser using Lowell method,measuring the Young modulus of optical glass strip using single slit diffraction method,and measuring the refractive index of thick optical glass sheet.The 2~(nd) question was an electricity black box,students should judge the structure and properties of the components,and measure the vacuum permittivity and the relative permittivity of the given medium by the circuit of the black box and the permittivity measuring instrument.The design of the test questions was strong,and the grades were well differentiated.It was suggested that students should pay attention to the use of basic experimental instruments,the experimental skills,and the flexible application of basic physics principles.
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