Comment on I can whistle at the speed of sound
Jumuta@sh.itjust.works 2 months agojust shine a laser through a thing of zircon (index of refraction=1.923~2)
Comment on I can whistle at the speed of sound
Jumuta@sh.itjust.works 2 months agojust shine a laser through a thing of zircon (index of refraction=1.923~2)