Access to light is one of the most fundamental human needs. Without it, photosynthesis would grind to a halt -- and our oxygen and food would be destroyed along with plant life. Beyond plants, we need light for mental wellbeing and even energy. Yet it's often overlooked, and few people stop to think about the actual mechanics of light. Why does light behave the way it does? How does light help us view the world the way we do? Take a look through the following pages and find out!