Lasers (Basics)
20:45
How Lasers Work - A Complete Guide
10:55
Three-State Laser
2:07
This handheld device is a 'smart guide dog' for blind people | REUTERS
24:37
Physicist Explains Lasers in 5 Levels of Difficulty | WIRED
13:55
How lasers work - a thorough explanation
21:33
How lasers work
18:02
Femtosecond Pump-Probe Spectroscopy
12:17