Why does a photon have momentum and no mass, yet $p=mv$?
12847
If photons have no mass, how can they have momentum?
41466
Can the photoelectric effect be explained without photons?
45283
Why don't virtual particles violate conservation of mass/energy?
31390
What prevents photons from getting mass from higher order Feynman diagrams
8099
Does a photon exert a gravitational pull?
38673
General relativity: For massless particles, is the momentum and velocity 4-vectors equal?
43436
What exactly is a photon?
41407
How to derive or justify the expressions of momentum operator and energy operator?
59176
Amplitude of an electromagnetic wave containing a single photon
57961
Some doubts about photons
28057
Deriving $p = mv$ from translational symmetry (momentum conservation law)?
33110
The origin of the value of speed of light in vacuum
154772
The Momentum Operator in QM
147524
Why is the "canonical momentum" for the Dirac equation not defined in terms of the "gauge covariant derivative"?
105194
Quantum properties of objects with zero velocity
13251
Does a photon in vacuum have a rest frame?
88637
Why can a particle decay into two photons but not one?