In Kay Barnham's insightful book, 'What is Light', young readers and curious minds are invited on an engaging journey to explore the fundamental principles of light. This accessible guide breaks down complex scientific concepts into easy-to-understand explanations, covering everything from how light travels and why we see colors to the various ways light is used in our daily lives. Barnham’s clear, concise writing makes learning about refraction, reflection, and the electromagnetic spectrum a captivating experience. It's an excellent resource for anyone eager to grasp the basics of this vital phenomenon that shapes our perception of the world.