Key Characteristics of Green Lasers:

High Visibility: Green laser light is a specific wavelength (typically 532 nm) that is extremely visible to the human eye. It appears 10 to 50 times brighter than a red laser of the same power output. This makes it ideal for use in well-lit environments, for long-distance pointing, or for applications like astronomy where you need to point out stars or constellations.

Wavelength and Production: The production of green light is more complex than red light. Many green lasers use a multi-step process involving an infrared laser and a special crystal to produce the green beam. High-quality devices use filters to prevent the invisible, and potentially hazardous, infrared light from escaping.

Applications:

Presentations: Used as a pointer during business or academic presentations.

Astronomy: For pointing out stars and celestial objects.

Construction and Alignment: In professional tools for leveling and alignment, as the beam is very clear over long distances.

Entertainment: In light shows, discos, and as a toy for pets (like cats).

Hobbies and Safety: For signaling, hiking, or as a powerful flashlight with a long-range beam.