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结合"单臂电桥测电阻"这个实验的特点提出了一个设计性实验,并给出了解决方案.在指导学生做该实验时,要求学生来完成这个设计,可以帮助学生理解单臂电桥测量电阻的原理. 相似文献
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对设计性实验的一些思考 总被引:21,自引:0,他引:21
讨论了大学物理教学中设计性实验的不同形式和要求方法,包括理论教学中的原理性设计实验、操作性设计实验和制作性设计实验,以及对已有实验方案进行改进,对不同的实验题目可要求给出一种最佳方案或给出尽可能多的方案,给出了几个参考题目和部分题目实现的参考方案。 相似文献
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本文结合教学实践,对如何在物理实验中开展设计性实验等问题进行了讨论,认为在物理实验中先少量地进行一些实验方法,实验技能方面的专项训练,能较快提高学生的科学实验能力,可使学生顺利完成设计性实验,更好地发挥设计性实验的功能,达到其教学目的,并对设计性实验开设后的收获和体会进行了总结。 相似文献
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为了优化教学行为,提高教学质量,有必要开发一些自创性实验.结合教学和实践经验,总结了开发自创性实验的10种策略. 相似文献
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提供了两条设计探究式物理实验的思路,即选用学生熟悉的事例和传统的物理实验,设计成探究式物理实验.设计了5个探究式物理实验,并就此对教学给出了自己的体会. 相似文献
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普通物理实验中综合性、设计性实验的开设 总被引:35,自引:1,他引:34
与传统验证性实验相比,综合性、设计性实验更有利于培养学生的综合素质和创新能力,本文介绍了武汉大学近年来开设综合性、设计性实验的作法。 相似文献
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利用激光综合光学实验仪进行设计性实验研究。完成利用游标卡尺代替单缝进行单缝衍射实验的拓展实验研究;完成利用激光综合光学实验仪测得蔗糖溶液的旋光度与其浓度成正比关系,并利用该关系进行未知浓度蔗糖溶液浓度测量的拓展实验研究。 相似文献
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The well-known Fraunhofer multi-slit diffraction is described as the multi-slit interference modulated by the singleslit diffraction, namely the multiplication between the single-slit diffraction factor and the multi-slit interference factor. By considering the simplified argument we show that the multi-slit diffraction of evanescent waves which are in the near-field region also has the interference and diffraction effects, and that this two-fold effect can be expressed as the convolution of the diffraction factor and the interference factor. Our conclusion could be helpful to understand the contribution of evanescent waves to the optical responses of sub-wavelength structures such as slits and grooves. 相似文献
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Donald H Kobe 《Annals of Physics》1979,123(2):381-410
The Aharonov-Bohm (AB) effect shows that electromagnetic potentials can influence an electron in a field-free region. The single-slit and double-slit electron diffraction patterns are explicitly calculated here by the Feynman path integral method for different configurations of the magnetic field in order to compare the effect of the vector potential with the effect of the magnetic field. When an electron passes through a magnetic field behind the slits, the whole diffrection pattern is shifted due to the Lorentz force. When an electron passes through two slits with magnetic flux confined to a small cylinder between them, the double-slit diffraction pattern is shifted within the single-slit diffraction envelope. The asymmetric diffraction pattern corresponds to a nonzero average displacement and momentum of the electron even though the field exerts no force on the electron. This behavior can be understood on the basis of a quantum-mechanical interference effect. The classical limit of the electron diffraction patterns is taken to obtain the classical particle distributions. The effect of the potential vanishes in the classical limit, while the effect of the magnetic field persists because of the Lorentz force. 相似文献
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