9.1 WAVES
9.1.1 Wave Medium | 🎧
9.1.2 Graphical Representation of Waves | 🎧
9.1.3 Wave speed | 🎧
9.1.4 Wave Intensity | 🎧

9.2 PHASE
9.2.1 Phase Relationship | 🎧
9.2.2 Phase Relationship in Graphs | 🎧

9.3 LONGITUDINAL WAVE
9.3.1 Transverse Vs Longitudinal | 🎧
9.3.2 Sound Wave | 🎧
9.3.3 Graphs of Longitudinal Wave | 🎧

9.4 ELECTROMAGNETIC WAVE
9.4.1 The Electromagnetic Spectrum | 🎧
9.4.2 Polarization | 🎧
9.4.3 The Three Polarizer Problem | 🎧

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Demonstrations: Click here

Explanation Videos: Click here

Animations: Click here

Applet:
Wave Speed {phet applet}
Displacement-position vs Displacement-time {xmphysics geogebra}
Progressive vs Stationary (xmphysics geogebra)
Longitudinal vs Transverse (xmphysics geogebra)
Standing Pressure Wave (oPhysics applet)
EM Wave (oPhysics applet)
Two Polarisers (xmphysics geogebra)

(retired)
Longitudinal Wave {cabrillo flash}
EM Wave {cabrillo flash}
Polarizers {cabrillo applet}