4. Waves (SL)

SHM (loads just for this):

• Graphing circular motion displacement (animated gif)

• 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)

Wave Types:

• Longitudinal Wave (Surendranath)

• Transverse Wave (Surendranath)

• interactive site that explains heaps about transverse (and some longitudinal) waves

• Waves on string (PhET)

• Sound Waves (PhET)

Superposition :

• Geogebra (good one) for adding/subtracting wave pulses

• Salford Uni's Site

• Surendranath's Site (pulses)

• interactive site that explains heaps about transverse (and some longitudinal) waves

Polarization:

• Polarized Light (geogebra)

• Malus' Law (Geogebra)

• Another Malus' Law experiment

Reflection & Refraction:

• Refraction (PhET)

• Deep water into shallow water! (Geogebra)

• Refraction (Fendt)

• Refraction step by step (Fendt)

• Falstad Ripple Tank

• Snell's Law and TIR

Diffraction:

• Diffraction 4 pages of notes & animations from Salford Uni

• Diffraction around hills (Salford Uni)

• Diffraction through adjustable slit (Salford Uni)

2 source interference patterns Links:

• Interference of water waves (HKNG)

• Young's 2-slit experiment with path difference (Uni of Virginia)

• Young's 2-slit experiment with variable sep-dist & wavelength (Fendt)

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

• Wave interference (PhET)

• 4 pages of superposition animations & notes (Salford Uni)

• Wave tank (Falstad)

• HKNG's (HTML5 or java applet)

• PHET: water, sound & light

• Falstad wave tank

Standing Waves Links:

• String standing wave (Surendraneth)

• String standing wave step by step (Fendt)

• String standing wave with harmonics (HKNG)

• Open & Closed Pipe standing waves (Fendt)

• Detailed explanation of pipe standing waves (Uni of NSW)

• crazy membrane standing wave (Falstad)

• Great explanation of "timbre" on guitar string (Zona Land Education)

• interactive site that explains heaps about transverse (and some longitudinal) waves