光电效应实验中截止电压随光强变化原因的探索  

Change of cut-off voltage with light intensity in photoelectric effect

作　　者：杨振乾[1] 王鑫园 苏为宁[1] 

机构地区：[1]南京大学物理学院,江苏南京210093

出　　处：《物理实验》2014年第6期30-33,共4页Physics Experimentation

基　　金：国家基础科学人才培养基金资助项目(No.0204G088);江苏高校优势学科建设工程资助项目

摘　　要：在光电效应实验中提出等效电阻的理论模型,并通过实验论证等效电阻随光强的变化关系,推出附加电流与光强成线性关系,通过估算找到等效电阻与光阑面积的关系,成功地解释了光电效应实验中截止电压随入射光的强度变化这一实验现象.In photoelectric effect experiment,a theoretical model of the equivalent resistance was put forwarded.The relationship between equivalent resistance and light intensity was proved experimentally,a linear relation between additional current and light intensity was deduced,and the relationship between equivalent resistance and diaphragm area was also estimated.As a result,the change of cut-off voltage with the intensity of incident light was well explained.

关 键 词：光电效应 截止电压 附加电流 

分 类 号：O462.3[理学—电子物理学]