CIE Properties of Waves

Waves [FREE] - Longitudinal and transverse waves explained
Wave Speed [FREE] - How to measure how fast these waves are travelling
Reflection, Transmission and Absorption [FREE] - Bouncing waves
Refraction - Waves that change direction when they meet a boundary
TIR and Refraction Equations - Calculating what happens to the light
Lenses - These refract light and can form an image of an object
Ray Diagrams - Converging lenses and drawing the images they make
Images - Real and virtual images and how we can calculate their magnification
The Electromagnetic Spectrum - A range of transverse waves with many uses
Sound [FREE] - Particle vibrations between 20 and 20,000 Hz, and how our ears pick these up