This book is packed with stunning colour photographs and diagrams. Together with a detailed and expertly written text, it provides an accurate, comprehensive account of the topic of light and sound for key stage 3 students. Main text is supported by a series of fact files which provide information at a glance: history file, future file, test file and fact file. Topics covered include: The speed of light, colour and brightness, reflection, refraction, mirrors and lenses, lasers and holograms, sound waves, echoes and sonar, infrasound and ultrasound, ears and hearing, and recording and storing sounds.