![]() Question: Does faster than light travel/communication contradict special relativity?Īnswer: No, but there are interesting consequences here that make people think it is unlikely. ![]() So now we reduce our question to, does faster than light travel/communication violate special relativity? As I explain below, faster than light travel/communication does not contradict special relativity. The obvious candidate is special relativity. The only other way for us to reach a contradiction is for faster than light travel/communication to contradict something else. Question: Does faster than light travel/communication lead to a logical contradiction?Īnswer: No, because it is not a self-contradictory idea. Since the idea of faster than light travel is logically conceivable, it has no self-contradiction, and therefore there is no a priori contradiction. In order for an idea to lead to a logical contradiction, there needs to be something that it contradicts. I'm wondering if there is some simple thought experiment that can be explained to a layman to convince them that faster than light information propagation would lead to logical contradictions (not just physical ones)? I know the reason physicists take the speed of light so seriously is that going faster than it would lead to logical contradictions. Brian shrugs and says "no mechanism we know of" ( 7:50).Īnd then there were a lot of comments (on the Youtube video) saying "maybe Brian just lacks imagination". Joe then wonder if there could be some technology that could allow them to observe us unconstrained by the speed of light. ![]() The alien civilization would have to be within 100 thousand light years away to observe modern humans at all. So some of them must be watching.īrian says "take a 5 billion light year ball and everything is finite then" ( 5:33). There was a Joe Rogan episode with Brian Greene where Joe thinks aliens are watching us because the universe is infinite and there are an infinite number of them.
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