Do Virtual Photons Travel with the Speed of Light?
112965
Are virtual particles limited by the speed of light?
50289
The vacuum light speed: Is it really constant, i.e., independent of location in space-time?
34626
How does the propagation of gravity work for photons?
20412
Frequency of a photon
41041
Does a photon instantaneously gain $c$ speed when emitted from an electron?
66972
Is there any way to measure the one-way speed of light?
47568
Is it experimentally proven that photons travel at speed $c$ in vacuum?
77372
"Speed" of Gravity and Speed of Light
100807
Are the Maxwell equations a correct description of the wave character of photons?
116871
Do photons take all paths or not?
3909
Does $E = mc^2$ apply to photons?
62039
What does a sphere moving close to the speed of light look like?
42816
Does entanglement have a speed or is it instantaneous
14922
Do tachyons move faster than light?
38865
How can a Photon have a "frequency"?
67127
Does the speed of light vary in non-inertial frames?
65533
Does gravity slow the speed that light travels?