Linked from
The 22 pages that link to The Waves, each with the reason it gives.
Snell's lawNarrower topic: Snell's law applies to wave propagation across a boundary.
InterferenceNarrower topic: Interference requires waves whose oscillations can overlap.
Phase velocityNarrower topic: Phase velocity is one way to quantify a wave's propagation.
WavefrontNarrower topic: A wavefront is a geometric feature of a propagating wave.
Radio waveNarrower topic: Radio waves are transverse waves whose fields propagate through space.
BreakwaterNarrower topic: Breakwater design begins with the waves that approach its site.
SurfboardNarrower topic: A breaking wave supplies the moving slope that propels a surfboard.