Lasers

The year is 1967. The laser, that improbable beam of coherent light, is barely seven years old. Hal Hellman, writing for the U.S. Atomic Energy Commission's Understanding the Atom Series, captures a moment of technological infancy when the world was just beginning to grasp what light made to order might mean. This is not a textbook. It is a time capsule. Hellman walks readers through the physics of stimulated emission with clarity and enthusiasm, explaining how atoms can be coaxed into releasing photons in perfect synchronization. He explores the applications that seemed revolutionary then: the promise of laser surgery, the potential for optical communications, the possibilities for scientific measurement. Some of these futures arrived. Others exceeded imagination. A few remain on the horizon. For anyone curious about where our laser-saturated world began, this slender volume offers a window into the scientists who first learned to tame light.