Are increases in Planck's constant and the speed of light operationally distinguishable?
38720
Is it possible to speak about changes in a physical constant which is not dimensionless?
127355
Where is radiation density in the Planck 2013 results?
47242
Time dilation due to change in speed
11053
Planck's Law in terms of wavelength
61714
Can One-Way Speed of Light be Instantaneous?
67127
Does the speed of light vary in non-inertial frames?
116728
Why does speed of light have to be constant?
57961
Some doubts about photons
7618
What is the speed of light relative to?
115572
Theoretical proof of the constant of speed of light $c$ in vacuum in all frames of references
15685
Does slowing light violate relativity?
8077
Photons in expanding space: how is energy conserved?
115239
Is the Speed of Light an universal spacetime constant, the velocity of electromagnetic waves, or of photons?
37941
Can light travel slower than the maximum?
1206
GR. Einstein's 1911 Paper: On the Influence of Gravitation on the Propagation of Light
106119
Why is there no permittivity-type constant for gravitation?
12597
Does the speed of medium affect the path of light?