Is the speed of light universal for all mediums?
23937
What is the mechanism behind the slowdown of light/photons in a transparent medium?
103827
Does magnetic propagation follow the speed of light?
10781
Accelerating particles to speeds infinitesimally close to the speed of light?
112965
Are virtual particles limited by the speed of light?
12267
(Almost) double light speed
127383
Speed of light in general relativity
41041
Does a photon instantaneously gain $c$ speed when emitted from an electron?
22402
If I am travelling on a car at around 60 km/h, and I shine a light, does that mean that the light is travelling faster than the speed of light?
95801
Medium with refractive index less than unity?
15685
Does slowing light violate relativity?
974
Speed of light in a gravitational field?
3909
Does $E = mc^2$ apply to photons?
16748
What happens if light/particles exceeded the speed of light for a particular medium?
124797
What is the speed of time?
40148
Does light have mass?
58728
Why does the speed of light in vacuum have no uncertainty?
17152
Do all massless particles (e.g. photon, graviton, gluon) necessarily have the same speed $c$?