Lazer | Pen

: A tiny semiconductor that converts electricity into light.

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

: Typically AAA or lithium-ion batteries that provide the electrical energy. : A tiny semiconductor that converts electricity into light

: 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. it excites electrons

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