Why does light follow the Fermat's principle of least time?
15352
How is Fermat's least time principle proven?
15372
How does light know which path is fastest?
131705
Relativity Of Simultaneity Confusion
128695
Why do people use real values for the Wick-rotated time $\tau$?
115572
Theoretical proof of the constant of speed of light $c$ in vacuum in all frames of references
15019
Does a single photon's energy depend on frequency? (photoelectric effect)
28488
I am confused about the idea that the speed of light is independent of the speed of the source of light
84743
Why is light described by a null geodesic?
75580
Derivation of the speed of light using the integral forms of Maxwell's Equations
47988
Reflection At Speed of Light
26363
How does faster than light travel violate causality?
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?
19850
Why is the speed of light defined as 299792458 m/s?
15685
Does slowing light violate relativity?
127383
Speed of light in general relativity
89837
Speed of light when accelerating
91032
Are light waves sinusoidal functions?