| 利用三次样条函数绘制光电管的I-U特性曲线 |
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| 引用本文： | 郭琳.利用三次样条函数绘制光电管的I-U特性曲线[J].物理与工程,2006,16(4):38-40. |
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| 作者姓名： | 郭琳 |
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| 作者单位： | 徐州建筑职业技术学院,徐州,221008 |
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| 摘 要： | 在光电效应法测普朗克常量实验中需要人工绘制不同频率下光电管的I-U特性曲线,并从曲线上确定截止电压,获取有关截止电压与入射频率的关系,计算出普朗克常量.针对该实验中手动绘制I-U特性曲线过程繁琐、精确度低、容易出错的问题,阐述了在计算机上如何利用三次样条函数数值模拟特性曲线的原理和方法.
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| 关 键 词： | 光电效应法 三次样条函数 I-U特性曲线 |
| 收稿时间： | 2005-09-14 |
PLOTTING CHARACTERISTIC CURVES OF PHOTOVALVE BY CUBIC SPLINE |
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| Guo Lin.PLOTTING CHARACTERISTIC CURVES OF PHOTOVALVE BY CUBIC SPLINE[J].Physics and Engineering,2006,16(4):38-40. |
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| Authors: | Guo Lin |
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| Institution: | Xuzhou Institute of Architectural Technology, Xuzhou,Jiangsu 221008 |
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| Abstract: | In the experiment of measuring Planck constant by photoelectric method, the characteristic curves under different frequencies are manually plotted.From cut-off voltages determined from the curves, the relationship between cut-off voltage and incident frequency could be acquired, and then the Planck constant could be calculated. Aiming at eliminating complex procedure, low accuracy and easy errors in manual plotting, the principle and method of numerically simulating the characteristic curves by cubic spline in computer are introduced. |
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| Keywords: | photoelectric method cubic spline I-U characteristic curve |
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