_GD5_ t1_jcsi79m wrote on March 19, 2023 at 5:37 AM

Reply to TIL that in WW2, a Marine Corps Corsair pilot used his propeller to chew off the tail of an enemy aircraft after his guns jammed, while under fire from the enemy plane's tailgunner. The enemy plane crashed but the Corsair pilot made it back to base, receiving the Navy Cross for his actions. by hipster_deckard

Here is a better description. The Japanese plane was a Kawasaki Ki-45 “Nick” reconnaissance plane.

https://military-history.fandom.com/wiki/Robert_R._Klingman

_GD5_ t1_j7glxpn wrote on February 6, 2023 at 5:34 PM

Reply to comment by -Raskyl in Why are green and red laser pointers so cheap and available, but yellow ones not so much? by SurprisedPotato

No, it’s because the atmosphere is scattering blue light between you and the mountain. Yellow light is unscattered.

_GD5_ t1_j7glkeu wrote on February 6, 2023 at 5:32 PM

Reply to comment by zerpa in Why are green and red laser pointers so cheap and available, but yellow ones not so much? by SurprisedPotato

Lasers are not great light sources for displays. You have to do something to get rid of the coherence, otherwise you get a lot of speckles that either distract you or make you sick.

_GD5_ t1_j7fdzu1 wrote on February 6, 2023 at 11:54 AM

Reply to Why are green and red laser pointers so cheap and available, but yellow ones not so much? by SurprisedPotato

Cyan and yellow solid state lasers exist. They are not common or cheap though.

Red and blue lasers technology was driven by the CD and DVD industries. A lot was invested to make them fast and cheap. Green was pushed later to make RGB displays and because humans are very sensitive to that color. Green pointers are perceived as very bright. There hasn’t been much invested in yellow or cyan.