No, I didn't say "things" (meaning a physical object of some sort to me), I just said that "travel" at FTL speeds is possible <smile>. Adding "mass" would make it a "thing". I suppose as long as a tachyon's mass remains "imaginary", then it would not be restricted to c speed. But, since it is classified as a "particle" and not something else (force, wave, etc.), then to me this means it *does* have mass. Confusing.Anonymous wrote:"Things can travel FTL if particles defined to be able to travel FTL exist"?don wrote:Oh, FTL travel is certainly possible, as tachyons do it all the time, if the theory behind their existence is correct.
Agreed.a) There's no reason to believe that they interact with tardyons (slower-than-light) particles, so there's no reason to believe that converting a ship into them or sending a message using them is possible.
Yes, this is absolutely correct.b) Even if you could send a message or ship through converting it into tachyons, the message/ship would not travel FTL. ... Although the carrier particles (tachyons) are FTL, the modulated wave they carry (the message) is not.
But of course.Tachyons have imaginary mass (fittingly).
In other words, it's completely arbitrary as to whether the tachyonic object is travelling forwards or backwards in time.