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Talk:Faster-than-light travel

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Cherenkov radiation[edit]

Actually, in some circumstances, the speed of light can be surpassed in a non-vaccuumous setting in an effect known as Cherenkov radiation, so the part of this article that says light can't be surpassed in given circumstance is a bit untrue. Punky Your mental puke relief 23:30, 18 December 2009 (UTC)


I'm not a physics major and could be spreading false facts, but hasn't it recently been discovered that neutrinos can travel faster than light, with duplicated results? Woodgod (talk) 18:33, 3 January 2012 (UTC)

Found it on Wikipedia: wp:OPERA neutrino anomaly -- Nx / talk 18:37, 3 January 2012 (UTC)

Alcubierre drive power requirments[edit]

it is no longer thought that the Alcubierre drive requires such a tremendous amount of power it does have other problems but it is unclear if they can or cannot be over come, only more experimentation will tell us.— Unsigned, by: / talk / contribs 20:50, 9 May 2014‎ (UTC)

I will point out that the power requirements are still tremendous. The mass-energy of Voyager 1 (stated in the article to be the rough quantity still necessary to power the drive) is about 6.5 x 1019 Joules, which was roughly the amount of electricity generated on Earth in 2008. This is still a fairly ridiculous power requirement, though admittedly one we can feasibly reach. We'll see whether generating negative mass density is actually something we can do. - Grant (talk) 21:02, 9 May 2014 (UTC)

thank you friend, I'm not a scientist and from what I read it seems like much work needs to be done to even know if it is possible but I thought it was worth mentioning that it seems less impossible then it used to, someone mentioned that they may have figured out how to reduce the power requirements even more but its in this long video once more thank you for the fast response-- (talk) 00:38, 10 May 2014 (UTC)

It's an interesting problem. Even if we forget about the power requirements, the requirement that we find some way to "unfold" space inside the ring is troublesome. While it's generally true that most formulations of relativistic quantum mechanics don't disallow negative mass (nor does general relativity), it's still something we have no guarantee we'll ever find or even be able to find. - Grant (talk) 15:31, 10 May 2014 (UTC)

Possible Addition: Breaking Causality?[edit]

Just wondering if it'd be a good idea to put in a new section on why FTL is equivalent to time travel and can be used to break causality.Onychoprion (talk) 22:44, 28 March 2017 (UTC)

Thought experiment[edit]

Ins some strange universe on the other side of the speed of light, there is a RW-equivalent page on slower-than-light travel. Anna Livia (talk) 17:34, 4 December 2017 (UTC)