How the speed of light is constant in the universe if it decreases in water and glass and some other objects?
158809
What is the status of massless photons traveling through a medium?
10781
Accelerating particles to speeds infinitesimally close to the speed of light?
78223
How does a photon travel through glass?
62039
What does a sphere moving close to the speed of light look like?
91265
Has the speed of light changed over time?
96657
The speed of light as it approaches a massive body
56005
Speed of light travel
44164
Light Travels in straight line even in gravity
3952
Why does the speed of the Electromagnetic wave in the material depend on the frequency of the wave where as they are constant in vacuum (freespace)?
112965
Are virtual particles limited by the speed of light?
120679
Rømer's determination of the speed of light
65533
Does gravity slow the speed that light travels?
115572
Theoretical proof of the constant of speed of light $c$ in vacuum in all frames of references
22118
If all motion is relative, how does light have a finite speed?
20412
Frequency of a photon
57773
About the speed of light and gravity
55971
Why does the (relativistic) mass of an object increase when its speed approaches that of light?