Does it make an essential difference for SR or GR if the speed of light had a different but finite value?
33110
The origin of the value of speed of light in vacuum
155345
Can we use curved spacetime to measure the one-way speed of light?
54537
Special Relativity - Reference Frames $S$ and $S'$
1206
GR. Einstein's 1911 Paper: On the Influence of Gravitation on the Propagation of Light
30683
$F=ma$ calculation taking relativity into account?
35663
Is there a formula that gives the position of an object depending on the time, but which doesn't allow the object to surpass the speed of light?
45953
How can I explain the scientific basis of the constant speed of light to a $c$-decay proponent?
39399
Will free-fall object into black hole exceed speed of light $c$ before hitting black hole surface?
56065
How can the speed of light be a dimensionless constant?
14036
What is so special about speed of light in vacuum?
91385
Does quantum mechanics allow faster than light (FTL) travel?
103827
Does magnetic propagation follow the speed of light?
28488
I am confused about the idea that the speed of light is independent of the speed of the source of light
82624
"Newtonian limit" property of special relativity
4344
speed of gravitational waves
80291
Relativistic velocity addition from time dilation
65533
Does gravity slow the speed that light travels?