you know a very weak mass for the photons don t contredict the electromagnetism and the gauge invariances , that can be correct in modifying the maxwell eauqtions and the lagrange works and so we have equations of motions concrete.
we just stop the gauge invariances with the massless photons.
that changes even all about the speeds of electromagnetic waves.
we can try to prove this with an experiment with the speeds of electromagnetic rays and the frequences but how.
If I am correct, einstein is false for several things,an other idea to prove that these photons have a mass is the polarisations and lorentz transformation,
we must too differenciate the electromagnetic analyses in taking a difference between the electric field and the magnetic field.
the electromagnetic interactions are the keys and if they are not infinite ......that will prove my reasoning
the spheres and their volumes and also the gauss works can help about the charges but I am not sure
we need for a photon with a mass to break the symmetries for the standard model and for this we need to add other particles encoded and if this cold dark matter is the key and the bridge with the temperature , there is a limit somewhere very precise and if the neutrinos and this DE and DM in the standard model are the keys, so I can prove my reasoning
if I am right it is revolutionary in all humility, that disproves the photons massless
and that solves the quantum gravitation, the constant cosmological problem and that reconciliates newton. it is indeed important because we need to superimpose new groups of symmetries for the standard model and so we have broken symmetries,