​Properties of Waves

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• Waves [FREE] - Longitudinal and transverse waves explained

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• Wave Speed [FREE] - How to measure how fast these waves are travelling

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​The Electromagnetic Spectrum

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• The Electromagnetic Spectrum - A range of transverse waves with many uses​​

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​Light and Sound​

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• Reflection, Transmission and Absorption [FREE] - Bouncing waves

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• Refraction - Waves that change direction when they meet a boundary

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• Critical Angle and Refraction Equations - TIR and how to calculate the angles

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•  Sound [FREE]  - Particle vibrations between 20 and 20,000 Hz, and how our ears pick these up ​

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•  Oscilloscopes  - How these can be used to look at a signal​

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