Lazer Pen -

Not all laser pens are safe for casual use. They are classified by their power output (measured in milliwatts, ): LASERPEN the LASER PEN

: Appears much brighter to the human eye because our vision is most sensitive to the green spectrum. These are popular for stargazing as the beam is often visible in the air. lazer pen

: Mirrors at either end of a small chamber bounce these photons back and forth, creating a chain reaction that intensifies the light. Not all laser pens are safe for casual use

The term "laser" is an acronym for . Inside the sleek casing of a laser pen, several components work in unison: : 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.

: A tiny semiconductor that converts electricity into light.

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