Quote:
Originally Posted by Mohan.C  I believe the rest mass of a photon is said to be zero because photon is not a particle but is an interaction. |
The point that I hope to make is that anything that can be shown to cause an effect in / on the physical world (e.g. light causing a current to flow in a Photo-voltaic cell) has to be the result of some form of either a
force (Mass times Acceleration) or a
momentum (Mass times velocity).
In Either case Mass is intrinsically involved, and if you try to take the mass consideration out of the reaction or the interaction then you no longer get the reaction or the interaction. I don't care if a photon is a particle or the force or momentum carried in a two or three or 11 dimensional wave. The bottom line is still the same. It will have to act as either a force or as a momentum in order to be detected or to even interact with or to effect the physical world. Anything that could be conceived as massless, simply could not do this.