The Science of Light Book with Online Access code

Cambridge Discovery Education Interactive Readers are the next generation of graded readers - captivating topics, high-impact video, and interactive exercises designed to motivate and engage.
This reader explores the sources of light in space, and shows how light affects people and keeps our world going all day, all night. Use the unique code inside the book to access the online reader, complete with videos and interactive exercises. Word count: 2670. Lexile Reading Level: 680L.