All Questions
Tagged with informationfaster-than-light
36 questions
-12votes
0answers
89views
Faster than light information: Humans constantly restrict themselves with limits [closed]
If I have two people on the end of a pole 186K meters long, and we both agree pull means "yes" and a push means "no", then we can pass each other information at the speed of light,...
0votes
2answers
89views
Have we observed any real-like phenomena faster than the speed of light in vacuum? [duplicate]
A common thought experiment about shadows ask, what would happen if a bat flew across a very, very distant star? The farther the star, the faster its shadow would move, and there's no reason it couldn'...
-4votes
1answer
106views
Transmitting Data faster than the speed of light using entangled particles [duplicate]
If we have a pair of super-asymmetrical entangled particles, and move them a light year away so that they retain their quantum entanglement, and we set a clockwise spin (or vertical polarization) as 0 ...
- 11
0votes
1answer
63views
Do superluminal shadows drop the local temperature on distant objects?
There are lots of examples online of the scenario of someone with sufficient machinery casting a shadow of their thumb on the moon. It's argued the shadow travels faster than light, instantaneously ...
- 131
0votes
0answers
69views
About information transmission speed [duplicate]
Einstein says information cannot be transmitted faster than light. Say I set an alarm that ring at 9:00 am. I go to school, and wait until 9:00 am. Then I tell my friends that my alarm rang. If the ...
- 67
8votes
1answer
587views
Could information be transferred through a wormhole?
There was a paper published recently about the possibility of sending messages through a wormhole,see reference here. It has also been speculated that any entangled pair of particles—even particles ...
- 1,039
0votes
0answers
26views
Communication via entanglement [duplicate]
For years now i have in my haed a thought experiment for information exchange via quantum entanglement. And i am aware that something must be wrong with it but i can't figure out what it is. The ...
-1votes
1answer
132views
Faster than light communication by entangled photons [duplicate]
Faster than light communication is not possible. If I measure the polarization of an entangled photon and it turns out to be right circularly polarized. In that instant, dont I know that someone ...
3votes
1answer
117views
Nonlocality of a bug on movie screen
I am currently learning quantum mechanics using Griffiths. In the appendix, he goes to talk about EPR and Bell's inequality, and that experimental verification of Bell's inequality rejects the "...
6votes
4answers
2kviews
Faster than light information
I've seen there are a few answers on here previously about faster than light information travel, and my understanding is that it is impossible. However, I've just read an article https://www....
1vote
1answer
120views
Example of information travelling faster than the speed of light?
In the following situation, information seems to travel faster than the speed of light. Is there a mistake in my reasoning? Suppose we have an electric circuit. For times $t<0$, there is no current ...
- 1,609
7votes
4answers
2kviews
Could the speed of causality be (significantly) faster than $c$?
The other day my son (13) asked me whether it was possible that light went very slightly slower than our best measured $c$, and at the same time had a very tiny mass, but we aren't able to measure ...
-3votes
2answers
167views
Does "Superluminal travel of non-information" means we already "achieved" superluminal speeds?
From what I understood of Vsauce video talking about "Superluminal travel of non-information," the absence of information seems to travel faster than the speed of light, since we perceive ...
- 313
16votes
4answers
3kviews
Contradictions caused by moving faster than light
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. So some of them must be watching. ...
- 931
3votes
2answers
397views
Proof for impossibility of FTL Signals
Is there is formal proof for the fact that signals must always travel at a speed less than the speed of light in a vacuum? I understand that special relativity dictates that for massive particles to ...
- 183
