Lazer Pen Instant

: A lens at the tip focuses the scattered light into a tight, parallel beam that stays concentrated over long distances. A Spectrum of Colors

: When electricity hits the diode, it excites electrons, which release photons (light particles). lazer pen

: The most common and least expensive. They use simple diodes and are widely used in low-power pointers and barcode scanners. : A lens at the tip focuses the

: Mirrors at either end of a small chamber bounce these photons back and forth, creating a chain reaction that intensifies the light. They use simple diodes and are widely used

: 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.

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

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