this post was submitted on 18 Aug 2023
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I think it has to be A. You figure that if it were B, the people on the track would suddenly be traveling at a high velocity, but the train's velocity wouldn't be impacted at all, since there was no impact between the train and the people. Wouldn't this mean that the portal had created energy, which is impossible?
In classical physics you would be right, but in modern physics there is no standard frame of reference. It's equally correct to think that the people are still and portal is moving as it is to think that portal is still and people go in it immn fast speed.
Regardless, people and portal have large speed difference going in, so there will be large speed difference going out.
Fuck, you just made me question the whole thing. Cave Johnson must be turning in his grave.