正确理解半波损失

讨论了数值为π的相位突变和半波损失的区别与联系、光波在介质界面上反射以及在薄膜干涉中产波损失的产生,并纠正了许多基础物理教材对半波损失的错误理解。     

物理实验中的半波损失

本阐述了薄膜干涉中增透膜的反射和透射过程，指出了学生因忽视半波损失而对皂液薄膜厚度产生的错误认识，分析了学习中容易出现错误的原因，提出在教学中值得注意的问题．     

对薄膜干涉中半波损失问题的探讨

结合高中物理中常见的薄膜干涉实例,讨论了需要考虑半波损失的情形,以半波损失对明暗条纹形成位置的影响,给出了相应教学策略,以期为这一问题的深入分析提供新的视角。     

机械波的半波损失条件问题探析

半波损失问题是大学物理教学中的重点内容和难点问题.本文从基本的机械波波动方程入手讨论了机械波的半波损失问题.给出了机械波半波损失问题的基本条件和结论,并讨论了"固定端"反射和"自由端"反射两种特殊边界条件的半波损失问题.     

薄膜干涉中半波损失问题探析

讨论了薄膜干涉中半波损失的产生及形成条件。     

薄膜干涉反射光半波损失计算的讨论

从薄膜干涉现象及半波损失概念出发 ,分析讨论透明薄膜所处介质折射率不同时 ,反射光因半波损失所引起的额外程差的计算方法 ,作为《光学教程》中讨论额外程差的补充 ,并就讨论薄膜干涉的条件及其结果的表达式提出修改意见     

半波损失和附加光程差

分析了半波损失和附加光程差的区别与联系。从而指出．它们是不同的两个物理概念。     

半波损失与附加光程差

半波损失是比较常见的光学现象。在研究光的一次反射和二次反射现象中,常常遇到由于半波 损失而产生的附加光程差问题。     

折射和反射光振动矢量的突变分析

用菲涅耳公式分析光矢量经反射，折射时所发生的突变，剖析各种类型薄膜干涉中额外程差的选取，以及这种突变对薄膜干涉条纹衬比度所产生的影响。     

等厚干涉牛顿半环

本文给出了等厚干涉牛顿半环，分析了薄膜台阶产生的反射牛顿半环，并给出了利用牛顿半环测薄膜厚度的方法。     

位相突变与附加位相差

本文讨论了光波在两种介质分界面上反射和薄膜干涉的两束光的位相变化问题。     

退火温度对Ce掺杂ZnO薄膜光学特性影响的研究

采用溶胶凝胶(sol-gel)法,在普通载玻片和Si-SiO2衬底上成功制备Ce掺杂ZnO薄膜.利用X射线衍射仪(XRD)、原子力显微镜(AFM)及光致荧光光谱(PL)对样品的结构、形貌和光学特性进行表征.XRD谱表明大部分样品都有较好的c轴择优取向,而且随着退火温度的升高择优取向明显改善.PL谱中在390nm附近可观察到明显发光峰,退火温度升高能够提高本征发光峰强度,抑制可见光区发光强度.用AFM观察到的样品表面形貌表明,退火温度提高使样品表面更加平整,同时粒径变大.     

Overcoming Junior High School Students' Misconceptions About Microscopic Views of Phase Change: A Study of an Analogy Activity

This study was conducted to examine the effectiveness of an analogy activity, which was designed to overcome junior high students' misconceptions about the microscopic views of phase change. Eighty Taiwanese 8th graders were randomly assigned to either a control group or an experimental group. For the control group, the subjects were instructed through traditional teaching whereas for the experimental group, an analogy activity was conducted on students. This specific analogy activity was presented in the form of role-playing in which students acted as particles and worked together to perform the conditions of phase changes. Through analyzing these students' drawings of the atom arrangements for the three states of some substances, it was found that the students of experimental group, though in many cases, did not perform statistically better than did those of control group in an immediate posttest. The comparisons of a delay test between these two groups indicated that the analogy activity had clearly positive impacts on students' conceptual change on these scientific concepts in terms of long-term observations.     

由平面电磁波的反射导出TM波的模式本征方程

利用平面电磁波在界面上的反射和折射理论,分析垂直偏振波在芯层介面上的反射,得出沿Z方向传播的TM波在全反射时的相移,利用横向谐振重要条件得到TM模的模式本征方程。     

Modeling Change in Student Attitude Toward and Beliefs About Mathematics

Abstract

The authors used data from the Longitudinal Study of American Youth to investigate variables related to change in students' attitude toward and beliefs about mathematics in middle school and high school. Using hierarchical linear modeling techniques, the authors modeled variation in students' rate of change with variables associated with student characteristics, instructional experiences, and environment. They also identified variables that differentially affect change at different levels of secondary school (i.e., middle school vs. high school) and for different affective dimensions (i.e., attitude toward mathematics, beliefs about the social importance of mathematics, and beliefs about the nature of mathematics). Results showed a substantial negative change in students' attitudes toward and beliefs about the social importance of mathematics throughout secondary school. However, students' notions of the nature of mathematics did not change throughout secondary school. The authors identified variables related to change and found that they differed according to the level of secondary school and affective dimensions.     

山水诗与自然美

自然界的青山绿水在学艺术作品中被视为“第二自然”,是经过作再创造后呈现的艺术形象,它已成为表现人的主观情意的艺术载体,同时它又是人们认知的对象和审美客体,这就是“人化”的自然,它具有美的形式,是形式美的真切体现,山水之所以美还在于它常常作为独立的艺术形象,产生象征比喻意义,我国古典美学理论中的“比德”说导源于此,格式塔心理学派的“同构对应”论对自然山水与人的情感的联系作出了理性阐释。     

0.9Pb(Sc_(0.5)Ta_(0.5))O_3-0.1PbTiO_3/PbTiO_3多层薄膜制备及铁电性研究

以LaNiO3做缓冲层,用射频磁控溅射法在SiO2/Si(100)衬底上制备出0.9Pb(Sc0.5Ta0.5)O3-0.1PbTiO3/PbTiO3铁电多层薄膜.采用两步法在峰值温度750℃对薄膜进行退火.通过电滞回线和漏电流曲线对薄膜的铁电性能进行了测量.研究发现,原位生长的薄膜已经具备了较好的铁电性,这为(1-x)Pb(Sc0.5Ta0.5)O3-x0.1PbTiO3薄膜的低温制备提供了可能性.经过退火后,薄膜的铁电性略有下降,高温下铅的损失可以很好的解释这一现象.