Lazer Pen -

: Often more powerful and can cause fluorescence in certain materials, making them glow. Safety and Classification

: The most common and least expensive. They use simple diodes and are widely used in low-power pointers and barcode scanners. lazer pen

: Typically AAA or lithium-ion batteries that provide the electrical energy. : Often more powerful and can cause fluorescence

: A tiny semiconductor that converts electricity into light. each with different properties:

Laser pens come in various colors, each with different properties: