发光二极管测量普朗克常量实验的改进

Improving Planck constant experiment using light emitting diode

为了减小发光二极管测量普朗克常量实验中,二极管单色性和微小光强的判断对实验结果的影响,提出了利用单色仪判断二极管单色性优劣和利用光强探测器检测二极管刚导通时微小光强的改进方法.结果显示,使用改进后的方法测得的普朗克常量与标准值相对误差为1.24%,比改进前所得结果的准确值提高了80%.

In order to overcome the difficulty in determining themonochromaticity and detecting the small light intensity oflight emittingdiode and reduce its influence on the experimental results in the Planck constant experiment,an improved method was proposed,which used monochromator todetermine the monochromaticity of the diode andlight intensity detector to detect the small light intensity of the diode when it was just turned on.The results showed that the measured Planck constant using this improved method had a relative error of 1.24%,which increased the accuracy with 80%.