Hacker News with Generative AI: Lasers

Scientists discover laser light can cast a shadow (phys.org)
Can light itself cast a shadow? It may sound like a philosophical riddle, but researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow.

Physics, Science, Optics, Lasers

53 points by passwordoops 6 days ago | 20 comments

NASA Investigates Laser-Beam Welding in a Vacuum for In-Space Manufacturing (slashdot.org)

NASA, Space Exploration, Manufacturing, Technology, Lasers

78 points by CHB0403085482 10 days ago | 71 comments

New laser could cram GPS alternative into a shoebox (ieee.org)
Dramatically more sensitive motion sensors could help ships keep track of their positions at sea, even in rough weather or when a military opponent jams GPS signals. However, these advanced sensors are typically lab-scale in size. Now researchers have developed a new laser system to help make these sensors fit in a shoebox, as well as potentially mass-producible.

Navigation, Technology, Lasers, Military

79 points by fofoz 58 days ago | 98 comments

DragonFire Laser Weapon Will Equip Royal Navy Warships from 2027 (theaviationist.com)
The UK Ministry of Defence announced that the new, cutting-edge DragonFire laser will be installed on Royal Navy warships for the first time from 2027.

Military Technology, Royal Navy, Lasers, Defense

7 points by peutetre 67 days ago | 0 comments

Making a rickroll laser: A parametric speaker (10maurycy10.github.io)
Most speakers emit sound in all directions because they are relatively small compared to the wavelength.

Sound, Audio Engineering, DIY Projects, Lasers

190 points by pabs3 68 days ago | 61 comments

Transferring energy from nitrogen to argon enables 2-way cascaded lasing in air (phys.org)

Physics, Lasers, Science

76 points by wglb 88 days ago | 26 comments

Inside the Three-Way Race to Create the Most Widely Used Laser (ieee.org)

Lasers, Technology, Competition, Science

44 points by jnord 129 days ago | 5 comments

DARPA's military-grade 'quantum laser' will use entangled photons to outshine (livescience.com)

Quantum Computing, Military Technology, Physics, Lasers

12 points by smarm52 152 days ago | 3 comments

Army soldiers not impressed with Strykers outfitted with 50-kilowatt lasers (breakingdefense.com)