![]() This lesson illustrates the concept of index of refraction, Snell's law, and critical angle. This lesson demonstrates what polarization of light is and how a polarizer can be used to remove some orientations of light.Ī nice video demonstrating that a mirror doesn't reverse left and right, only forward and back. This lesson illustrates the basic principles behind double slit diffraction. This interactive lesson illustrates the basic principles behind single slit diffraction. Here are a couple of lessons related to resonance in an open tube or closed tube. This lesson page has many real life examples of Resonance at work. This interactive lab allows you to experiment with a patterned (phased) array to see the effects of interference. This interactive lab allows you to overlap two patterns to produce a third "interference" pattern that would apply to light, sound or moir� patterns. This interactive lab allows you to hear and experiment with the beat frequency created by the interference of two waves. This interactive lab allows you to see the Doppler effect and experiment with aspects that affect the Doppler effect. It shows both photon creation and photon absorption. ![]() This lesson examines where light comes from at the atomic level. Simulations of a pulse striking a new medium and a periodic wave striking a new medium. ![]() Some very clear simulations of waves occupying the same place at the same time: This lessons examines some of the key principles and vocabulary applying to waves.
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