The real fun starts when things move faster than the speed of light, that’s when you get Cherenkov radiation!
Comment on I can whistle at the speed of sound
dave@feddit.uk 1 month agoIt would also still be the speed of light. Always is, unless you specify ‘in a vacuum’ every time.
kuberoot@discuss.tchncs.de 1 month ago
tacosplease@lemmy.world 1 month ago
Adding to the fun - The light is still going the same speed within the medium, but it’s bumping into more things. Those collisions divert the light, lengthening the distance it travels through something like 1 cm of glass vs 1 cm in a vacuum. It changes the time it takes to travel through glass rather than the speed at which the light is moving.
At least that’s what I remember from a YouTube video.
xx3rawr@sh.itjust.works 1 month ago
Probably the Youtube video in question
tacosplease@lemmy.world 1 month ago
Yes that’s it! Thanks for the link!!