a laser "dot" at 4km distance

Image from i.redditmedia.com and submitted by sp__ace
image showing a laser "dot" at 4km distance

iller_mitch on June 11st, 2018 at 17:29 UTC »

Yep. So next time you're thinking about targeting that overhead aircraft with your 1+ Watt chinese laser pointer, please don't. That shit is still bright.

the_coff on June 11st, 2018 at 20:17 UTC »

Pink Floyd, at their 1994 tour, used 45w lasers at around 40mm width. A lighthouse keeper some 130 km away from their Oslo show saw the green lights and wondered what the hell that was.

Also, iirc, they had to shut down/re-route air traffic around the shows to avoid disaster

MechKeyboardScrub on June 11st, 2018 at 20:34 UTC »

How is this tagged overdone? I've never seen anything like this before, and I'm on Reddit a lot.