Interactive visual
01 · advanced
Charged Particle Motion
B bends, E pushes, together they drift
The Lorentz force curls a charge around magnetic field lines and crossed E and B make it drift sideways. Integrate it with Boris, not Euler.
Physics
Electromagnetism
Fields, charged particles and electromagnetic waves.
Interactive visual
02 · common
Electric Field Lines
add every charge's push, then follow the arrows
Coulomb fields add as vectors; tracing streamlines along the net field draws lines that leave positive charges, end on negative ones and never cross.
Interactive visual
03 · advanced
EM Wave Propagation
leapfrog E and B on a staggered grid
Light is E and B regenerating each other. A 1D Yee grid (FDTD) leapfrogs them in time, slows them in glass and blows up past the Courant limit.