Lazer Pen – Bonus Inside

: Mirrors at either end of a small chamber bounce these photons back and forth, creating a chain reaction that intensifies the light.

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 lazer pen

: The most common and least expensive. They use simple diodes and are widely used in low-power pointers and barcode scanners. : Mirrors at either end of a small

: Typically AAA or lithium-ion batteries that provide the electrical energy. lazer pen