3D lecture-demo programs for E&M
The work below is licensed under a Creative Commons Attribution 4.0 License. Please read the license before downloading the software.
The initial number is the chapter of Matter & Interactions (3rd
edition) in which the program is most useful.
Install VPython to use these programs.
These programs work with Python 2.7 plus VPython 6.11.
You can also run equivalent GlowScript VPython versions in your browser at tinyurl.com/MI-physics-demos.
Here are all of the programs listed below, in one zip file.
In these VPython programs, to rotate or zoom the "camera":
Right button drag or Ctrl-drag to rotate the camera to view the scene.
Middle button or Alt-drag to drag up or down to zoom in or out.
On a two-button mouse, middle is left + right.
13-fields A general utility that can display electric and magnetic fields; visualize potential difference, Gauss's law, and Ampere's law
13-Efield-point Electric field of a point charge in 3D
13-E-point-charge-drag Electric field throughout space around a charge; can drag the source charge
14-mobile-electrons Electrons moving through a positively charged lattice
15-E-ring-demo-dE Add up electric field of pieces of a ring to make electric field of a ring
15-E-disk-add-rings Add up electric field of rings to make field of a disk
15-E-sphere-outside-rings Add up electric field of rings to make the field outside a sphere
15-E-sphere-inside-rings Add up electric field of rings to make the field inside a sphere
15-Edisk Electric field near a uniformly charged disk
17-mobile-electron-current Electron current: mobile electrons driven by an electric field
17-cross-product 3D view of the cross product
17-cross-product-area 3D view of the cross product, with a parallelogram whose area is the magnitude
17-Bwire-with-r Magnetic field of a wire
17-B-loop-with-r-dB Magnetic field of a ring, one step at a time
17-B-loop-xy-xz Display magnetic field of a ring, in two planes
17-toroid Magnetic field of a toroid
18-Erings Electric field near a line of rings with linearly varying charge
18-SurfaceCharge Distributions of surface charge and electric field, electrostatics and circuits (currently GlowScript only)
19-RCcircuit Graphs of charge and current in an RC circuit, calculated iteratively
20-spark-mean-free-path Mean free path in a gas; relevant for Ch. 20 discussion of sparks
21-Gauss A qualitative introduction to Gauss's law
22-Faraday-coil Curly electric field associated with the changing magnetic field of a coil
22-Faraday-magnet Curly electric field associated with the changing magnetic field of a moving magnet
23-fieldlines Field lines of a point charge
23-radiate2D-fieldline-kink The kink in the field lines of an accelerated charge
23-pulse-plane-wave A pulse train of electromagnetic radiation
23-radiate2D A 2D slice of lectromagnetic radiation spreading out from an accelerated charge, by Joe Heafner
23-radiation-3D Radiative E and B spreading out in 3D from accelerated charge, by Joe Heafner
23-sinusoidal-plane-wave A plane wave of sinusoidal radiation
23-sinusoidal-wave-wavelength The meaning of wavelength
23-wavefront Rays and wavefronts at the boundary between two materials with differing index of refraction
23-lens Interactive ray tracing through a converging or diverging lens
S3-interference-constructive Constructive interference of two sources of electromagnetic radiation
S3-interference-destructive Denstructive interference of two sources of electromagnetic radiation
S3-interference-both Constructive and destructive interference of two sources
S3-crystal-planes Planes in crystals relevant for x-ray diffraction
S3-powder-xrays Powder x-ray diffraction
S3-standing-wave A standing wave produced by interference of leftward-going and rightward-going waves
At matterandinteractions.org is a an equivalent set of VPython demos for use with an installed Python.