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测物体转动拨量,验证转动定律是普物实验的基本内容.目前测转动馈量的仪器已有几种:如三线摆、扭摆和塔轮型转动实验仪;1984年南开大学物理系谭成章教授等设计、研制成功新型转动仪器——气垫转盘.笔者根据教学使用情况,对上述三线摆和气垫转盘作了一点比较研究,现分述如下:一、直观教学效果比较出物体转动保量是这个实验的基本内容,验证转动定律、平行轴定理都要通过出转动惯量I的值进行验证.测I值的方法有几种,笔者认为直接用转动定律I一M/卢的测量方法最简捷,实验教学效果最好.这是因为,按定义转动惯量是物体保持原有转… 相似文献
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随着中、小学素质教育的全面推进,物理教学与生产、生活的联系变的越来越紧密,这不仅体现了物理学本身的特点,而且更加符合教育的要求和教学的规律.在此我们向大家介绍几种利用日常用品制作的演示实验仪器. 相似文献
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我们在教学过程中发现,课本中一些演示实验和一些学生实验采用的器材可操作性不强,往往会影响实验的结果.如果把一些实验的器材在原来的基础上加以合理改进,减小原来实验器材不足存在的影响,可以使得一些实验的对比性增强,还会大大地提高一些实验的成功率. 相似文献
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对金属线膨胀系数测定实验的仪器改进 总被引:3,自引:0,他引:3
本针对金属线膨胀系数测定实验中存在的问题。提出了自己对实验仪器的改进方法。通过改进后进行实验,简化了操作过程,提高了测量精度。 相似文献
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让新实验诉说量子理论 总被引:5,自引:1,他引:4
在1998年完成和分析的几个新的物理实验显示了量子理论的微妙性,包括“波粒二重性”以及二粒子缠结态的不可分性.本文的分析表明:测量在破坏原来存在于客体及其环境间的量子相干性时必然要改变客体.因而“物理实在”应在两个层次上定义:“自在之物”与“为我之物”.量子力学中的波函数则正起了通过“虚拟的测量”将这两个层次的物质联系起来的作用. 相似文献
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本就如何加强应用性实验的开设,确保学生成绩的正态分布,以及教材结构的合理调整等方面进行了阐述。 相似文献
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研究脉冲时间1.8ms,输出能量约200J,光束发散角2mrad的自由振荡钕玻璃光束,经2m焦距透镜聚焦后穿过充有0~0.6MPa氨的热晕池(热晕池长1m)产十的整束热晕效应。用CCD系统测量激光束腰直径的时间积分值随氨气压的变化曲线及束腰光强空间分布图象,用数字显示式能量计测量热晕吸收系数,用硅光二极管—数字采集,分析仪—Roland绘图仪—计算机处理系统,测量激光中心光强随时间的变化曲线。用KDP倍频—高速分幅相机系统记录激光场强分布随时间的畸变。并用解析理论计算值与实验结果进行了分析比较。 相似文献
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WANG Man LI Jin LI Pei-Qin CHEN Xian-Neng CHEN Li-Jun JIANG Chun-Hua XIA Xiao-Mi LU Wei-Da QUE You-Kun LAN Yuan-Fen LU Chang-Guo CUI Xiang-Zong 《中国物理C(英文版)》1983,7(3):294-300
In this paper, a multi-strip scintillation counter hodoscope and a small on-line system are described. The hodoscope is a 4×4 array of scin tillation strip counter, each of which consists of a plastic scintillation strip of type NE104 with the dimension of 50×4×1cm3 and a Photomultiplier of type GDB-50L. An on-line program for hodoscope property test has been compiled. The hodoscope read-out system is linked with PDP-11/03 computer and with them some on-line experiments have been done.
The experimental results are as follows. The efficiency of each cell of the hodoscope is between 96.5% and 99.5%. The counting distribution caused by a radiative source Ru106 put at various locations can be displayed as a histogram directly and promptly on a printer. The intensity of cosmic ray fluxes and its distribution versus azimuthal angle has been measured. All these results are reasonable. The performances of this system are well and stable and it can be used in some experiments of high energy physics. 相似文献
The experimental results are as follows. The efficiency of each cell of the hodoscope is between 96.5% and 99.5%. The counting distribution caused by a radiative source Ru106 put at various locations can be displayed as a histogram directly and promptly on a printer. The intensity of cosmic ray fluxes and its distribution versus azimuthal angle has been measured. All these results are reasonable. The performances of this system are well and stable and it can be used in some experiments of high energy physics. 相似文献
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Two optical set-ups to implement wavelet transform with a single lens have been proposed, in which the wavelet filter was placed in front of the imaging lens or on the frequency plane. The general formula of the complex field distribution of the output plane has been deduced. The analysing wavelet functions of the band-pass wavelet filters with double and circular slits have been discussed. 相似文献
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本文报告了用自适应光学技术实时补偿大气湍流的激光发射初步实验结果。校正后的靶面峰值能量大约是校正前的3.5倍。 相似文献