Program Editor Java

The EJS Magnetic Bar Field Model shows the field of a bar magnet and has a movable compass that reports the magnetic field values. The bar magnet model is built by placing a group of magnetic dipoles along the bar magnet. You can modify this simulation if you have Ejs installed by right-clicking...

The Partitioned Box program displays the number of particles on one half of a box as a function of time after a small hole is made in the partition dividing the box in half. The purpose of this simulation is to gain insight into the tendency of macroscopic systems to approach a well defined...

The QM Wigner program displays the time evolution of the position-space wave function and the associated quasi-probability distribution in phase space via the Wigner function. The default wave function is a Gaussian wave packet in a harmonic oscillator. Additional states and other potential...


Platforms: Mac

The STP LJ2DMetropolis program is a Monte Carlo simulation of Lennard-Jones particles in two dimensions in contact with a heat bath. The default initial condition is a rectangular configuration of N=64 particles in a box of length L = 18 and a temperature T= 1. STP LJ2DMetropolis is part of a...


Platforms: Mac

The QM Measurement program displays the time evolution of the position-space wave function and can be used to simulate the quantum-mechanical measurements of energy, position, and/or momentum. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the qm_measurement.jar file...


Platforms: Mac

The STP Hard Disks Metropolis program is a Monte Carlo simulation of hard disks in two dimensions. The default initial condition is a rectangular configuration of N=64 particles in a box of length L = 40. You can slowly increase the density of the gas (by setting the minimum scale length between...


Platforms: Mac

The STP LJ Thermal Equilibrium program simulates the interaction between two systems of Lennard-Jones particles brought into thermal contact. The purpose of this simulation is to explore the nature of thermal equilibrium and the relation, if any, between the kinetic and potential energies of two...


Platforms: Mac

The STP EinsteinSolidHeatBath program simulates the exchange of energy between an Einstein solid and a heat bath. The purpose of this simulation is to determine the properties of a Einstein solid at different temperature T and to compare our results with analytical calculations of the...


Platforms: Mac

The STP 1DIsing program is a Monte Carlo simulation of a one-dimensional Ising model in equilibrium with a heat bath at temperature T using the Metropolis algorithm. The default is N=64 spins up (s = 1) with no external field with heat bath temperature T=1. STP Ising1D is part of a suite of Open...


Platforms: Mac

The Introductory Physics Pendulum Lab program asks students to develop a model for a pendulum. It is distributed as a ready-to-run (compiled) Java archive. Double-clicking the ejs_intro_PendulumLab.jar file will run the program if Java is installed. In order to modify this simulation (and see how...


Platforms: Mac

The Introductory Physics 2D (Projectile) Motion Lab program asks students to develop a model for a ball with projectile motion. It is distributed as a ready-to-run (compiled) Java archive. Double-clicking the ejs_intro_2DMotionLab.jar file will run the program if Java is installed. In order to...


Platforms: Mac

The GR Kerr Stone program simulates orbits of an object in the equatorial plane near a rotating black hole using the Kerr metric. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the gr_kerr_stone.jar file will run the program if Java is installed. The default is an...


Platforms: Mac

The QM Spins program simulates the quantum-mechanical measurement of spin-1/2 and spin-1 particles. The default simulation shows the result of measuring the z component of spin on a beam of spin-1/2 particles with a random (or statistical) mixture of spin orientations. Additional initial states...


Platforms: Mac

The EM Radiation program displays the electric field vectors (in the x-y plane) and magnetic field contours (for the field in the z direction) calculated from the Lienard-Wiechert potentials for a charged particle. The default scenario shows the resulting radiation from a charged particle in...


Platforms: Mac

The QM Momentum Measurement program displays the time evolution of the position-space wave function and can be used to simulate the quantum-mechanical measurement of momentum. The default wave function is an equal-mix four-state superposition in the infinite square well. QM Momentum Measurement...


Platforms: Mac

The QM Momentum Space program displays the time evolution of the position-space wave function and the associated momentum-space wave function. Additional states and other potential energy functions can be specified using the Display | Switch GUI menu item. QM Momentum Space is one of 18 Open...


Platforms: Mac

The QM Momentum Expectation Value program displays the time evolution of the position-space wave function and the associated momentum expectation value. The default wave function is a Gaussian wave packet in a harmonic oscillator. Additional states and other potential energy functions can be...


Platforms: Mac

The GR Embedding program displays a representation of the curvature of space near a massive object. GR Embedding is part of a suite of Open Source Physics programs that model aspects of General Relativity. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the...


Platforms: Mac

The QM Position Expectation Value program displays the time evolution of the position-space wave function and the associated position expectation value. The default wave function is a two-state superposition of infinite square well states. Additional states and other potential energy functions...


Platforms: Mac

The STP Widom Insertion Method program estimates the chemical potential of a Lennard-Jones fluid using the Widom insertion method. The default system is a box with linear dimension L = 20 with N =100 particles at a temperature T = 1.0. STP WidomInsertionMethod is part of a suite of Open Source...


Platforms: Mac