| 微小长度变化量的实验研究 |
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| 引用本文： | 周菊林,梅孝安,李蓓.微小长度变化量的实验研究[J].实验室研究与探索,2011,30(10). |
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| 作者姓名： | 周菊林 梅孝安 李蓓 |
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| 作者单位： | 湖南理工学院物电学院,湖南岳阳,414006 |
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| 基金项目： | 湖南省教育厅科研项目(08C396);湖南省教育厅教改项目(2009257) |
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| 摘 要： | 总结了光杠杆放大法、千分表测量法、光的干涉测量法和光的衍射测量法测量微小长度变化量的方法,通过对实验装置进行相应的改造与组装,并用其测量原理和方法以及相关的实验装置对金属受热时的微小伸长量及线胀系数进行了相应的测定,同时对实验结果和误差进行了比较与分析。实验表明,4种测量方法中千分表测量法的相对误差和标准偏差均接近最小值,是4种方法中最理想的测量方法。该实验也有利于激发学生的创新意识,培养他们的研究潜能。
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| 关 键 词： | 光杠杆 千分表 迈克尔逊干涉仪 光的干涉 单缝衍射 线胀系数 |
Experimental Study of the Changes of Small Length |
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| ZHOU Ju-lin,MEI Xiao-an,LI Bei.Experimental Study of the Changes of Small Length[J].Laboratory Research and Exploration,2011,30(10). |
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| Authors: | ZHOU Ju-lin MEI Xiao-an LI Bei |
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| Institution: | ZHOU Ju-lin,MEI Xiao-an,LI Bei(School of Physics and Electronic,Hunan Institute of Science and Technology,Yueyang 414006,China) |
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| Abstract: | This paper sums up some methods to measure small length changes such as the enlargement of the light lever,dial indicator,interference of light and single slit diffraction.Tiny length changes and metal linear expansion coefficient are also measured by transforming the device.In the meantime the experimental results are compared and analyzed.It improves the measurements of tiny length changes on the basis of predecessors.The methods of dial indicator prove to be better than other methods.This experiment can ... |
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| Keywords: | optical lever dial indicator Michelson interferometer interference of light single slit diffraction linear expansion coefficient |
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