温度对零电流法测普朗克常数实验的影响THE INFLUENCE OF TEMPERATURE ON THE EXPERIMENT OF MEASURING PLANCK CONSTANT BY ZERO CURRENT METHOD
王云志,孙会娟
摘要(Abstract):
在用汞灯作为光源的光电效应实验中,为了找到最佳的预热时间,使用二十多台同一厂家的光电效应实验仪,在常温下,使用秒表记录预热时间,用激光红外测温仪测量了不同预热时间对应的汞灯光源的温度。用零电流法测得五种滤色片对应的遏止电压。通过开空调和电风扇来降低汞灯表面的温度,与常温下相比较,在同样的预热时间下,计算出普朗克常数以及相对误差,找到了零电流法测定普朗克常数实验中汞灯光源的最佳预热时间,分析了汞灯温度对普朗克常数测量结果影响的定性关系。
关键词(KeyWords): 光电效应;普朗克常数;零电流法;预热时间
基金项目(Foundation): 北京联合大学2023年度教育教学研究与改革项目(项目号JJ2023Y053)
作者(Author): 王云志,孙会娟
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