Britannica Educational Publishing 
Britannica Guide to Sound and Light [PDF ebook] 

Audio and visual cues facilitate some of our most powerful sensory experiences and embed themselves deeply into our memories and subconscious. Sound and light waves interact with our ears and eyes-our biological interpreters-creating a textural experience and relationship with the world around us. This well-researched volume explores the science behind acoustics and optics and the broad application they have to everything from listening to music and watching television to ultrasonic and laser technologies that are crucial to the medical field.