query: Do photons have no mass?
positive_passages.docid: 12847
positive_passages.text: If photons have no mass, how can they have momentum?
negative_passages.docid: 32388
negative_passages.text: Does relativistic mass have weight?
negative_passages.docid: 104024
negative_passages.text: Does the mass of an electron change with its "energy state"?
negative_passages.docid: 80749
negative_passages.text: If Energy can be converted into mass, why can it not be converted into charge?
negative_passages.docid: 17152
negative_passages.text: Do all massless particles (e.g. photon, graviton, gluon) necessarily have the same speed $c$?
negative_passages.docid: 90476
negative_passages.text: Why can light (photons) bends in a curve through space without mass?
negative_passages.docid: 43436
negative_passages.text: What exactly is a photon?
negative_passages.docid: 149033
negative_passages.text: photon electron interaction such that the photon energy does not correspond to any state change
negative_passages.docid: 87598
negative_passages.text: Can we define the effective mass or the moving mass of a photon?
negative_passages.docid: 95125
negative_passages.text: Rest mass of the photon
negative_passages.docid: 151039
negative_passages.text: Why are there no elementary charged, spin-zero particles?
negative_passages.docid: 86156
negative_passages.text: Do photons have a duration?
negative_passages.docid: 113606
negative_passages.text: Dimensionless quantities
negative_passages.docid: 112625
negative_passages.text: Reduced mass in quantum physics (Hydrogen Atom)
negative_passages.docid: 92532
negative_passages.text: Conservation of Mass during Electron - Positron Annihilation
negative_passages.docid: 76255
negative_passages.text: Does a gluon have mass or not?
negative_passages.docid: 89295
negative_passages.text: The interpretation of mass in quantum field theories