Can you imagine life without light? Well, actually... it's impossible, because without light there would be no life on Earth at all! Learn all about the most disgusting and dreadful aspects of light. From zit-zapping rays and night-vision goggles to spooky shadows and serious sunburn, this book is full of yucky, painful and fascinating facts. You can see the brilliance of light too, with some easy (and painless!) experiments.