Actually dark has no speed since it doesn't really exist. It's merely a lack of light.Gitsnik said:That's not a stupid question! It is the exact inverse of the speed of light through the medium in question. It's like asking how light passes through a vacuum when there is nothing in it for it to pass through (imagine a thick plastic case, completely see through - make the insides a vacuum, then shine a torch onto one side - what happens).PK2k9 said:"What's the speed of dark?" -.-