Ben Goad

Waves

Standing Waves - shows open and closed pipes and the difference between displacement and pressure graphs

Huygens Principle - explaining reflection and refraction using Hugen's Principle

Standing Waves on a string - shows what it says plus more than one harmonic at a time

Formation of standing waves - as it says

Geometric Optics - perfect for a basic introduction to lenses and then the detail of a ray diagram

SHM and oscillations - perfect for sixth form. Created by Salford UniversityDoppler

Doppler Explained - some nice animations from the school of Physics, Sydney, Australia

Geometric Optics - from Phet