Displacement Phasor, wave and motion of mass or pendulum (Geogebra) GOOD!!!
reference circle concept vert and hoirz (use dropdown menu: oscillations: SHM)
Interactive reference circles (with sine vs cosine wave)
mass on spring (HKNG) with ref-circle & y, v, a vs t graphs
Ref-circle with mass on spring AND graph of y vs t (use dropdown menu: oscillations: phase-graph)
How kinetic and potential energy change with location or time (use dropdown menu: oscillations: mass-spring oscillations: then either K,U vs x or K,U vs t)
Single-Slit Diffraction (Fendt)
Young's 2-slit experiment with path difference (Uni of Virginia)
Young's 2-slit experiment with variable sep-dist & wavelength (Fendt)
2, 3, 4, 5 or more slit interference pattern that shows how it fits in single slit pattern and weird wiggles (java file - may not work on some computers: from NTNU)
Diffraction grating lab (GOOD!!!) (Geogebra)
Wave interference (PhET)
Wave tank (Falstad)
Thin Film Interference (Geogebra)
reminder of partial reflections in or out of phase (Surendranath) use drop down menu: wave motion: reflection and transmission)
Great site with animations on resolution, single slit diffraction, double/triple/etc slit diffraction and more! (Southwestern College, California USA)
(HTML or java)
Doppler: Surrandraneth
Doppler with singing: Vascak
Doppler (downloadable JAR (java) file from HKNG)