4 ms·

I don't get it. What is non-arbitrary FTL? How does sendding information FTL not violate causality? What is the speed of light in the reference frame of the t

by hgsgm 4y ago

I don't get it. What is non-arbitrary FTL? How does sendding information FTL not violate causality? What is the speed of light in the reference frame of the traveling information? Or does the information teleport? What is the speed of light in the reference frame of light traveling at the speed of light?

bmacho 4y ago
Some people can move FTL, some people can't. The time coordinate increases with causality. (Same as in Newtonian physics.) If you want SR to hold, then yes, information teleports. If you want to travel FTL, then SR can't hold obviously.
Ono-Sendai 4y ago
Have a look at https://forwardscattering.org/post/36 https://forwardscattering.org/post/36