"We see a rainbow when the Sun shines on rain drops in the sky. When you see a rainbow, the Sun is behind you. These interesting facts about this topic can be discovered in Rainbows, a Looking at the Sky book."--P [4] of cover.
Explains the new area of optic technology dealing with making, using, and manipulating photons of light. It includes lasers, fiber optics, holography, solar cells, and other light-source processing of information.