Diodes

• Diode type: Zener Diode
• Voltage rating: 18V
• Power: 500mW
• Material type: Semiconductor

This laser pointer or laser pen is a small handheld device with a laser diode emitting a very narrow coherent low-powered laser beam of visible light, it is frequently used in lecture halls and demonstrations to point at topics of interest on a presentation board. In a school setting, they have become ubiquitous, and they are very useful teaching aids.