- #1
Benzoate
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how can an elementary particle like a photon be massless? How can physicist measure and detect a photon if the don't know its inherent properties? I know a photon travels at the speed of light , but wouldn't you have to know a particle mass , in order to know its speed? Or are physicists referring to a particle who's mass is extreemely close, to zero, but nonetheless the particle still has a nonzero mass when physicists refer to a massless photon?