Recent content by HyperUniverse

Could you be a bit more explicit, please? Has anybody done such tests? Where can I read more about? Because I take it like this...let's imagine that we shoot an arrow through the air. Then the arrow passes through "a floating ball of water" (just imagine it). Then it comes out of this...

Hi, I know the speed of light is the highest in vacuum. And in any other mediums is a bit slower. I just want to know... ...if a light passes through a medium (water let's say) and comes out in vacuum, will it retain the same speed as it had in the water, or will it increase back to its...