光电效应的逸出功

由于工作的需要，我们查阅了一些物理教材，希望了解光电效应中各种金属的逸出功、截目频率及与之对应的波长，结果却发现了许多矛盾：同—种金属，各个教材所提供的数据各不相同；有的问题，甚至同—个教材所提供的两个数据也不能取得一致．下举几例（为了叙述方便，表和习题均按本文的顺序编号）：     

在近代物理教学中素质教育的探索

本主要介绍在近代物理教学中，对康普顿效应及光电效应的再解释，把“量子场论”的观点引进大学基础物理，为学生打开一个对物理学前沿理论了解的窗口。     

这是一幅不受光控的示意图

非农机专业适用的“全国中等农业学校教材《物理》”是目前全国中等农校正在使用的课本,该书第221页图12-7是一幅利用光电效应控制电动机工作的示意图，如图1所示．按照课本第221和222页所述，该图表示的控制过程是：“当光照在光电管上时，光电管电路中产生微弱电流。     

光电子的最大初动能一定随入射光频率的增加而增大吗?

光电效应是中学物理教学中大家所熟悉的一种现象，也是教学中的重难点．无论在教材中还是教师在授课过程中均要强调：发生光电效应时，光电子的最大初动能随入射光频率的增加而增大．但在实验中，却发现了与之不相符的奇怪现象．     

微机在我院物理实验教学的应用

近年来，随着微型计算机的普及，计算机辅助教学已成为各高校重要改革内容之一．为加大我院物理教学与管理的微机化力度，提高实验数据处理的层次及评判的量化程度，培养学员利用微机研究和解决问题的能力，我们教研室近年来进行了将计算机引人物理实验教学的一些尝试，下面就我们的工作做一介绍．l利用计算机推进物理实验电化教学进程的尝试自94—95学年，我们为本科队学员开设了“光电效应”实验（选用华北水利电力学院研制的GD—l型光电效应测试仪）．为加大物理实验电化教学力度，我们为实验配制了相应学时的GAI课件．整个课件包括六…     

国外光电效应的模拟实验

介绍了美国高中物理教材中的光电效应的模拟实验,并从物理教学论的角度分析了实验设计的依据和实验要点.     

对光电效应实验装置的剖析

光电效应是物理学中一个重要课问题，也是近代物理学几个重大的实验之一．一般物理学教材均要介绍光电效应．但是，在众多的教材中，对光电效应实验装置图的引入存在差异，有些有失科学性，因而引起广大物理学教育工作者的关注．     

如何理解与学好中学原子物理

高中原子和原子核物理在新教材[1]中,包括原子结构、原子核结构、核能及波粒二象性共四章.这部分内容在中学物理中占的比重不大,但对学生了解和掌握近代物理学的发展却很重要,教学中切不可掉以轻心.其中玻尔理论、能级概念、核能的计算、光电效应和波粒二象性为重点,也是学生最难掌握的内容.本文拟就如何学好原子物理,分别从教材特点、光电效应与波粒二象性、能级概念和物理模型的     

“光电效应”的教学设计与创新

结合光电效应教学研究现状，针对光电效应传统教学存在的问题，从彰显物理学科特征出发，对光电效应重新进行教学设计，并指出了光电效应教学中需明确的两个问题。     

光强就是发光强度吗?

现行高中物理教材第三册在光电效应一节中提到光强的概念，但未指明其定义和单位，导致在教学实践中对光强概念和单位的理解有多种．笔者认为弄清这个概念及其单位很有必要．下面就几种认识的正误加以辨析．     

Some torsion potentials

Using the notion of torsion potentials, the duality between antisymmetric tensor fields and scalar fields is discussed. First-order actions with these fields, the connection and the metric as independent variables are presented.     

Some non-abelian Q-balls

Q-balls are a class of extended objects that arise in a large group of field theories with unbroken global symmetries. Earlier work investigated the properties of these objects for theories with abelian symmetries. We extend this work to some simple models with symmetry groups SO(3) and SU(3). We also develop parts of the theory of long-wavelength excitations of a general Q-ball.     

Some nucleon-nucleonS-wave potentials

A number of solvableS-wave potentials are presented which match theS-wave nucleon-nucleon phase shifts. The calculation shows that for simple, four parameter potentials there are many rather different parameter sets which yield nearly the same scattering data. We give furthermore some parameter sets which are especially suited for the low energy region. The possibility of fitting the phase shifts with an energy-dependent repulsion was examined phenomenologically. We also calculated a Scott-Moszkowski version of the potentials.     

Some Kasner-type solutions

We present here some exact solutions of Einstein equations; they depend on one variable and take into account a cosmological constant or an electromagnetic field.     

Some examples ofq-regularization

An introduction to Hopf algebras as a tool for the regularization of relevant quantities in quantum field theory is given. We deform algebraic spaces by introducingq as a regulator of a noncommutative and noncocommutative Hopf algebra. Relevant quantities are finite providedq 1 and diverge in the limitq 1. We discussq-regularization on differentq-deformed spaces for ⁴ theory as examples to illustrate the idea.     

On the Identity of Some von Neumann Algebras and Some Consequences

Among von Neumann algebras, the Weyl algebra W{\mathcal{W}} generated by two unitary groups {U(α)} and {V(β)}, the algebra U{\mathcal{U}} generated by a completely non-unitary semigroup of isometries {U ₊(α)} and the Weyl algebra W₊^h{\mathcal{W}_{+}^{h}} pertaining to a semi-bounded space with homogeneous spectrum of the generator of {V(β)}, all share the property that their representations are completely reducible and the irreducible representations are equivalent. We trace this fact to the identity of these algebras, in the sense that any of them contains a representation of any of the remaining two algebras, which in turn contains the original algebra. We prove this statement by explicit construction. The aforementioned results about the representations of the algebras follow immediately from the proof for any of them. Also, by the above construction we prove for W^h₊{\mathcal{W}^{h}_{+}} the analog of a theorem by Sinai for W{\mathcal{W}} : given {V(β)} with semi-bounded homogeneous spectrum, there exists a completely non-unitary semigroup {U ₊(α)} such that {V(β)} and {U ₊(α)} generate W₊^h{\mathcal{W}_{+}^{h}}.     

Some Properties of D-Concurrence

In this note,we give a new lower bound for the concurrence,which is related to D-concurrence.For the Werner states,we compare that this D-concurrence bound with the other known bound.In addition,some of new upper and lower bounds of D-concurrence are given.