- #1
RadiantL
- 32
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Hi, so I was going over my lectures notes and I was looking at the Invariance, S2 for space time.
I was just wondering why they call it time-like for S2<0 and space-like for S2>0 because,
S2>0 says that there is an inertial frame where events occur at the same time (this has to do with time, why call it space like?)
and
S2<0 says that there is an inertial frame where events occur at the same position
(this has to do with space, why call it time like?)
So yeah, why the weird naming?
Also I was wondering, according to my notes it says when events are time like they can be connected by a signal slower then light, and could be causal.
So can there be events where they can be connected by a signal and not be causal? ... And in S.R, when books say causal, they mean an event causes another right?
Thanks
I was just wondering why they call it time-like for S2<0 and space-like for S2>0 because,
S2>0 says that there is an inertial frame where events occur at the same time (this has to do with time, why call it space like?)
and
S2<0 says that there is an inertial frame where events occur at the same position
(this has to do with space, why call it time like?)
So yeah, why the weird naming?
Also I was wondering, according to my notes it says when events are time like they can be connected by a signal slower then light, and could be causal.
So can there be events where they can be connected by a signal and not be causal? ... And in S.R, when books say causal, they mean an event causes another right?
Thanks