Graphical labs
Time-evolving simulations with conserved quantities on screen
N-body gravity
Softened Newton + velocity Verlet
Wave interference
2D wave equation, two sources
EM cavity (FDTD)
2D TM Yee Maxwell, PEC walls
Orbital mechanics
Two-body Kepler vs Verlet trail
Ising model
2D Metropolis, Onsager T_c
Reaction–diffusion
Gray–Scott patterns
Schwarzschild orbits
Timelike geodesic + precession
Double pendulum
Lagrangian chaos, energy check
Schrödinger packet
Crank–Nicolson TDSE