9. Waves (HL)

SHM (loads just for this):

• Displacement Phasor, wave and motion of mass or pendulum (Geogebra) GOOD!!!

• pendulum lab from PHET

• mass on spring lab from PHET

• resonance lab from PHET

• 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

• phase difference: ref circle with masses on springs

• 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)

Diffraction and Interference:

• Single-Slit Diffraction (Fendt)

• 2-source interference: HKNG

• 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)

• Alternative Young's experiment with variable bits (Vtorov)

• 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)

Doppler:

(HTML or java)

• Doppler with moving source and/or observer: Geogebra

• Doppler: Surrandraneth

• Doppler with singing: Vascak

• Doppler (downloadable JAR (java) file from HKNG)