- See: Propulsion
According to the Star Trek: The Next Generation Technical Manual and The Making of Star Trek, the speed of light is equivalent to the speed of warp 1 on the scales used by Starfleet in the 23rd and 24th centuries.
Modern physics experiments have shown that the "phase velocity" of laser light can exceed c, and some observed phenomena in quantum mechanics also exceed c. However, practical applications of these experiments do not exist because it can be shown that no information or particles can by those means actually be transmitted faster than light. Other than the information cited to Star Trek: First Contact, this information is not canon, but is considered to come from a Memory Alpha permitted resource. According to Albert Einstien's theory of relativity, though, faster than light travel is not possible because when an object accelerates most of it's energy goes into increasing it's own mass, so at speeds approaching c, all of it's energy goes into this process, therefore rendering faster than light travel impossible.