2D wave equation with point sources — interference, diffraction, and superposition
Click to add/remove point wave sources. Each source oscillates and emits circular waves that interfere.
Constructive interference (crests meet): bright regions. Destructive interference (crest+trough): dark.
The 2D wave equation: ∂²u/∂t² = c²∇²u − γ∂u/∂t with periodic boundary forcing at each source location.