Louise Spilsbury & Richard Spilsbury 
Sources of Light [PDF ebook] 

This book looks at the different places light comes from, including natural and artificial sources. – Discover the difference between a light source and a reflective object and how you can tell which is which. – Look at our largest and most important light source – the Sun – and what happens when you take sunlight away. – Explore light technology by finding out how we use lasers and fibre optics. And much more!