3 ms·
> 5. However, if there exists a privileged reference frame, then this can be worked around. Don't know if she mentioned it, but there is at least a unique refe
by lamontcg 4y ago
> 5. However, if there exists a privileged reference frame, then this can be worked around.
Don't know if she mentioned it, but there is at least a unique reference frame, which is the CMBR rest frame.
- mr_mitm 4y agoShe absolutely mentions it. It's basically her entire point. I was waiting and waiting for her to make her point and explain why FTL would not violate causality. Then she hand waves about the comoving frame in two sentences, insinuating that it might be a preferred frame of SR, and that's it. It's not like this is some huge oversight that she found there. After all, we define the age of the universe to be in the CMBR rest frame, because it will be less in any other frame. So the CMBR rest frame is unique, yes, but it is not fundamental in the framework of SR. See this, for instance: https://www.astro.ubc.ca/people/scott/faq_basic.html https://www.astro.ubc.ca/people/scott/faq_basic.html