TIL the US Military designed a laser rifle called the PHASR rifle, which disorients and temporarily blinds the target. It also looks like Storm Rifle in Halo 4. : r/todayilearned
Rare-earth-doped laser gain media, explained by RP Photonics Encyclopedia; trivalent, ions, laser crystals, glasses, neodymium, ytterbium, erbium, thulium, holmium, praseodymium, cerium, lanthanide lasers
Laser - Wikipedia
Laser - Wikipedia
How the Laser Egg Will Ensure Your Kids Are Breathing Healthy Air at Home