: Mirrors at either end of a small chamber bounce these photons back and forth, creating a chain reaction that intensifies the light.
Laser pens come in various colors, each with different properties: lazer pen
: A tiny semiconductor that converts electricity into light. : Mirrors at either end of a small
: The most common and least expensive. They use simple diodes and are widely used in low-power pointers and barcode scanners. They use simple diodes and are widely used
The Laser Pen: From Presentation Tool to High-Tech Gadget A laser pen (or laser pointer) is a handheld, battery-powered device that uses a to emit a narrow, coherent beam of visible light. Originally designed as a specialized tool for teachers and presenters, these devices have evolved into ubiquitous gadgets used for everything from amateur astronomy to advanced material engraving. How Laser Pens Work
The term "laser" is an acronym for . Inside the sleek casing of a laser pen, several components work in unison: