Lasers and LEDs in Liquid HELIUM (4 degrees above absolute zero)
Added 2019-09-29 17:56:18 +0000 UTCThe lab I worked in had some leftover liquid helium so we froze some LEDs and laser diodes!! This vid is from my 2015 (and my commentary is pretty annoying lol) but the content is pretty cool. It's not every day you get to interact with something so unbelievably cold.
