New PSRC collection resources
http://www.compadre.org/psrc/
The latest material additions to the PSRC.en-USCopyright 2014, ComPADRE.orgpsrc@compadre.orgpsrc@compadre.orgWed, 09 Apr 2014 21:52:20 ESThttp://blogs.law.harvard.edu/tech/rsshttp://www.compadre.org/portal/services/images/LogoSmallPSRC.gifPSRC
http://www.compadre.org/psrc/
12535Fourier Program
http://www.compadre.org/psrc/items/detail.cfm?ID=7063
The Fourier program displays the Fourier transform of a user-defined complex spatial function of position. The default spatial function is a complex Gaussian. Additional parameters can be specified using the Display | Switch GUI menu item.
Fourier is an Open Source Physics program written for the teaching of mathematical methods in the sciences. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the math_fourier.jar file will run the program if Java is installed. Other mathematical methods programs are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Math.Mathematical Tools/Series and Functionshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7063Wed, 09 Apr 2014 21:52:20 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7063Fourier Analysis Program
http://www.compadre.org/psrc/items/detail.cfm?ID=7064
The Fourier Analysis program displays the Fourier transform of a user-defined complex spatial function of position and time. The default spatial function is a time-dependent complex Gaussian. Additional parameters can be specified using the Display | Switch GUI menu item.
Fourier Analysis is an Open Source Physics program written for the teaching of mathematical methods in the sciences. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the math_fourier_analysis.jar file will run the program if Java is installed. Other mathematical methods programs are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Math.Mathematical Tools/Series and Functionshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7064Wed, 09 Apr 2014 21:46:57 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7064Falling - A Constant Force Example
http://www.compadre.org/psrc/items/detail.cfm?ID=3057
This website contains a detailed development and comparison of a classical and quantum mechanical description of motion in a constant linear potential ("falling"), complete with diagrams. This example is a part of a larger collection of examples in which the classical and quantum mechanical descriptions are compared. (Note that there are thirteen pages, and that the user must use the navigation buttons at the bottom of the page)Quantum Physics/Bound State Systemshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=3057Wed, 09 Apr 2014 21:35:07 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=3057Exploring Student Understanding of Energy through the Quantum Mechanics Conceptual Survey
http://www.compadre.org/psrc/items/detail.cfm?ID=8916
We present a study of student understanding of energy in quantum mechanical tunneling and barrier penetration. This paper will focus on student responses to two questions that were part of a test given in class to two modern physics classes and in individual interviews with 17 students. The test, which we refer to as the Quantum Mechanics Conceptual Survey (QMCS), is being developed to measure student understanding of basic concepts in quantum mechanics. In this paper we explore and clarify the previously reported misconception that reflection from a barrier is due to particles having a range of energies rather than wave properties. We also confirm previous studies reporting the student misconception that energy is lost in tunneling, and report a misconception not previously reported, that potential energy diagrams shown in tunneling problems do not represent the potential energy of the particle itself. The present work is part of a much larger study of student understanding of quantum mechanics.General Physics/Physics Education Researchhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=8916Wed, 09 Apr 2014 21:26:48 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=8916Photoelectric Effect Model
http://www.compadre.org/psrc/items/detail.cfm?ID=10272
The EJS Photoelectric Effect model simulates the Photoelectric effect discovered by Hertz in 1887 and described theoretically by Einstein in 1905. Light of a given frequency (and energy) shines on a metal. If the frequency (energy) of the light is greater than the work function, W, of the metal, electrons are ejected and can form a current (which is shown in milliAmperes). These photoelectrons will also have a kinetic energy if the energy of the light is greater than the workfunction. they will have kinetic energy. If subjected to an electric potential the electrons can be stopped from reaching the plate and stop current from flowing in a circuit.
The EJS Photoelectric Effect model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_qm_photoelectric.jar file will run the program if Java is installed.Quantum Physics/Quantum Experimentshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=10272Wed, 09 Apr 2014 20:58:03 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=10272Eigenstate Superposition Model
http://www.compadre.org/psrc/items/detail.cfm?ID=7945
The Eigenstate Superposition model illustrates the fundamental building blocks of one-dimensional quantum mechanics, the energy eigenfunctions ψ<sub>n</sub>(x) and energy eigenvalues E<sub>n</sub>. The user enters the expansion coefficients into a table and the simulation uses the superposition principle to construct and display a time-dependent wave function using either infinite square well (ISW) or simple harmonic oscillator (SHO) eigenfunctions.
The Eigenstate Superposition model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_qm_Superposition.jar file will run the program if Java is installed. Quantum Physics/Bound State Systemshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7945Wed, 09 Apr 2014 20:53:45 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7945Dirac Delta Scattering Model
http://www.compadre.org/psrc/items/detail.cfm?ID=6990
The Ejs Dirac Delta Scattering model displays the time evolution of a plane wave incident on a Dirac delta function barrier. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_DiracDeltaScattering.jar file will run the program if Java is installed. The default wave function shows a right-moving plane wave incident on the barrier. The energy of the wave function can be changed with the slider. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting “Open Ejs Model” from the pop-up menu item.
Ejs Dirac Delta Scattering model was created using the Easy Java Simulations (Ejs) modeling tool. Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models. Additional Open Source Physics programs for quantum mechanics are available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.Quantum Physics/Scattering and Continuum State Systemshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=6990Wed, 09 Apr 2014 20:46:18 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=6990Complex Function Plot Program
http://www.compadre.org/psrc/items/detail.cfm?ID=7065
The Complex Function Plot program displays a user-defined complex function of position and time using representations that map phase into color. The default complex function is a time-dependent complex Gaussian and the representation can be changed by selecting a radio button. Additional parameters can be specified using the Display | Switch GUI menu item.
Complex Function Plot is an Open Source Physics program written for the teaching of mathematical methods in the sciences. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the math_complex_function_plot.jar file will run the program if Java is installed. Other mathematical methods programs are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Math.Mathematical Tools/Complex Variableshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7065Wed, 09 Apr 2014 20:22:04 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7065Circular Well Model
http://www.compadre.org/psrc/items/detail.cfm?ID=9639
The Circular Well model displays the 2D energy eigenstates of a particle trapped in a very deep two-dimensional circular well. Because the Schrödinger equation for this system is separable into radial and angular differential equations, the solution can be expressed as a product of a Bessel function and and a complex exponential.
The Circular Well model is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_qm_CircularWell.jar file will run the program if Java is installed. You can modify this simulation if you have EJS installed by right-clicking within the plot and selecting “Open EJS Model” from the pop-up menu item.Quantum Physics/Bound State Systemshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=9639Wed, 09 Apr 2014 19:54:24 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=9639CLASSE Institute for Physics Teachers: Labs & Lending Library
http://www.compadre.org/psrc/items/detail.cfm?ID=5547
This collection provides instructions for a range of inquiry-based physics labs covering topics that include Mechanics, Waves, E&M, Optics, and Quantum Scattering. Comprehensive, standards-based lab manuals are available for download, and users have completed training may borrow lab kits from the Cornell lending library if the lab materials are unavailable in the classroom.General Physics/Collectionshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=5547Wed, 09 Apr 2014 19:46:48 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=5547The Transactional Interpretation of Quantum Mechanics
http://www.compadre.org/psrc/items/detail.cfm?ID=1940
This article introduces the interpretation of the formalism of quantum mechanics, the Transactional Interpretation (TI) which addresses some issues raised by recent tests of Bell's inequalities. TI is non-local, relativistically invariant, and fully causal. A detailed comparison is made with the Copenhagen interpretation. Also, there is a link providing articles that have cited this one.Quantum Physics/Foundations and Measurementshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=1940Wed, 26 Mar 2014 00:03:23 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=1940Student Understanding of Blackbody Radiation and Its Application to Everyday Objects
http://www.compadre.org/psrc/items/detail.cfm?ID=13127
The Physics Education Group at the University of Washington is examining student understanding of blackbody radiation. Results from interviews and questions administered in sophomore and upper-division courses indicate that traditional instruction on blackbody radiation often does not help students apply the concepts and mathematical formalism to real-world objects. We are developing an online homework that approaches blackbody radiation from a phenomenological viewpoint, rather than from an idealized formalism. Initial use suggests that this homework helps students understand, for example, how the spectrum of an incandescent light bulb changes with temperature. Moreover, students who have worked through the homework also seem able to provide more robust answers during interviews than students who have not. However, we find that students continue to struggle with the concept of blackbody radiation. Additional research is needed to be able to design more effective instructional materials.Thermo & Stat Mech/Models/Blackbody Radiationhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=13127Tue, 25 Mar 2014 23:16:38 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=13127The Incredible Power of Concentration - Miyoko Shida
http://www.compadre.org/psrc/items/detail.cfm?ID=13206
This video performance demonstrates the concepts of center of mass, torque, and balance in a dramatic fashion. The performer a series of sticks of increasing size, starting with a feather and ending with a stick about 2 m in height. The precise nature of this feat is demonstrated at the end of the video.Classical Mechanics/Statics of Rigid Bodies/Equilibriumhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=13206Wed, 12 Mar 2014 01:54:22 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=13206Circus Physics: Center of Mass
http://www.compadre.org/psrc/items/detail.cfm?ID=13045
This video-based resource examines center of mass, a concept that plays an important role in balance. The video explores the relationship between torque and center of mass for a circus acrobat. The circus act involves two people: the bottom acrobat moves about the circus ring supporting the top acrobat, who balances on pointe upon her partner's head. When the top acrobat's center of mass is not over the point of support, a torque results. Background information explains how to calculate torque (in terms of a simpler see-saw system). Also included are tips on how to incorporate the video into instruction, discussion questions, and accompanying classroom activities.
This resource was developed in conjunction with the PBS series <i>Circus</i>. <b>See Related Materials</b> for a link to the full set of 8 Circus Physics video-based lessons.Classical Mechanics/Motion in Two Dimensions/Center of Masshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=13045Thu, 28 Nov 2013 00:44:45 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=13045Circus Physics: Conservation of Angular Momentum
http://www.compadre.org/psrc/items/detail.cfm?ID=13047
This video-based resource examines conservation of angular momentum through the motion of an acrobat doing aerial flips. It explores how a tucked position decreases the acrobat's moment of inertia, resulting in increased rotational velocity. To slow his rotation, he extends his legs. Through the acrobat's motion, the video illustrates how angular momentum is conserved for a body in flight. Supplementary materials help students integrate concepts to perform calculations relating to angular momentum and moment of inertia.
This resource was developed in conjunction with the PBS series <i>Circus</i>. <b>See Related Materials</b> for a link to the full set of 8 Circus Physics video-based lessons.Classical Mechanics/Rotational Dynamics/Conservation of Angular Momentumhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=13047Thu, 28 Nov 2013 00:13:34 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=13047An Introduction to the Cosmic Microwave Background
http://www.compadre.org/psrc/items/detail.cfm?ID=1265
This web site presents a basic introduction to the cosmic background radiation and cosmology. It includes terms, graphs, and animations to present the key principles and ideas of cosmology, the expansion of the universe, properties of light, the history of the universe since the Big Bang, inflation, the curvature of spacetime, and its implications on the fate of the universe. The presentation ends with a review of the terms and a list of links to other resources. This material is based on a public presentation by the author.Astronomy/Cosmology/Cosmic Microwave Backgroundhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=1265Wed, 27 Nov 2013 23:37:20 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=1265Physics Classroom: Resolution of Forces
http://www.compadre.org/psrc/items/detail.cfm?ID=11071
This interactive tutorial explains how to resolve a force into force components. Numerous examples are combined with a simple language and informative graphics to provide students with a solid grasp of the method. Several practice problems and a Check Your Understanding section allows students to self-assess their learning.
This is part of The Physics Classroom Tutorial series, a set of instructional pages aimed at students looking for a better grasp of basic concepts.Mathematical Tools/Vector Algebra/Vector Additionhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=11071Thu, 07 Nov 2013 22:38:28 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=11071STP Binomial Program
http://www.compadre.org/psrc/items/detail.cfm?ID=7260
The STP Binomial program displays the probability that n spins are up out of a total N non-interacting spin 1/2 magnetic moments. The default number of spins is 60 and the probability of that a single spin points up is 0.5.
STP Binomial is part of a suite of Open Source Physics programs that model aspects of Statistical and Thermal Physics (STP). The program is distributed as a ready-to-run (compiled) Java archive. Double clicking the STP_Binomial.jar file will run the program if Java is installed on your computer.Thermo & Stat Mech/Probability/Binomial Distributionhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7260Thu, 07 Nov 2013 22:29:56 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7260Easy Java Simulations Modeling and Authoring Tool
http://www.compadre.org/psrc/items/detail.cfm?ID=7305
Easy Java Simulations (EJS) is a Java program that enables both programmers and novices to quickly and easily prototype, test, and distribute packages of Java simulations.General Physics/Computational Physicshttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=7305Wed, 06 Nov 2013 22:27:51 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=7305Interactive Learning Tutorials on Quantum Mechanics
http://www.compadre.org/psrc/items/detail.cfm?ID=12945
We discuss the development and evaluation of quantum interactive learning tutorials (QuILTs), which are suitable for undergraduate courses in quantum mechanics. QuILTs are based on the investigation of student difficulties in learning quantum physics. They exploit computer-based visualization tools and help students build links between the formal and conceptual aspects of quantum physics without compromising the technical content. They can be used both as supplements to lectures or as self-study tools.Quantum Physics/Generalhttp://www.compadre.org/psrc/bulletinboard/Thread.cfm?ID=12945Thu, 31 Oct 2013 17:19:38 ESThttp://www.compadre.org/psrc/items/detail.cfm?ID=12945