How a Laser Works

By Mary Bellis, About.com Guide

High-voltage electricity causes the quartz flash tube to emit an intense burst of light, exciting some of the atoms in the ruby crystal to higher energy levels.

Previous

• Introduction - About Lasers
• How a Laser Works - Step 1
• How a Laser Works - Step 2
• How a Laser Works - Step 3
• How a Laser Works - Step 4

Next