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基于自制暗箱测量光电效应中光强与光电流的关系 被引量:3

Measurement of the relationship between light intensity and photocurrentin photoelectric effect based on self-made “black box” experimental device
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摘要 本文基于自制的“暗箱”实验装置,通过3种方法来验证光电流与光强的关系:一是通过控制光电管两端的电压研究不同光强下光电管两端的伏安特性曲线;二是通过在相同光强下改变光电管与光源的距离研究光电管的光电特性曲线;三是通过光强传感器直接测定光电流与光强的关系.以上3种方法的实验数据均通过PASCO平台进行实时采集和分析,获得了未达到饱和时光电流随光强增加而增大的实验结果. Based on the self-made“black box”experimental device,this paper verified the relationship between saturated photocurrent and light intensity by three methods:The first method is to study the volt-ampere characteristic curve under different light intensity by controlling the voltage of the phototube;The second one is to study the photoelectric characteristic curve of photocell by changing the distance between phototube and light source under the same light intensity;And the third one is that the relationship between photocurrent and light intensity can be directly measured by using light intensity sensor.The experimental data were collected and analyzed by PASCO platform in real time.When the saturation was not reached,the experimental results show that the photocurrent increased with the increase of light intensity.
作者 杨莹 张文攀 张计才 YANG Ying;ZHANG Wen-pan;ZHANG Ji-cai(College of Physics,Henan Normal University,Xinxiang,Henan 453007,China)
出处 《大学物理》 2022年第2期63-66,共4页 College Physics
基金 河南省高等学校重点科研项目计划(20A140018)资助。
关键词 光电效应 自制暗箱 PASCO平台 Photoelectric effect self-made“black box”experimental device PASCO experimental platform
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