from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Absence of mass; the state or condition of being massless.


from Wiktionary, Creative Commons Attribution/Share-Alike License

massless +‎ -ness


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  • Parallel plants exhibit "masslessness," seem frozen in time, lack internal structure, and generally collapse to dust at a human touch.

    parallel botany

  • The dark photon comes from a gauge symmetry, just like the ordinary photon, and its masslessness is therefore completely natural.

    Dark Photons

  • Coulomb's law seems to be valid at the longest distances so it must be set up by the photons close to masslessness.


  • When two charges are far away the uncertainty relation gives little freedom and the photon is closer to masslessness, We know that


  • If we put the energy and the tree-dimensional momentum together into the four-momentum we see that it is not constrained by the masslessness condition, we say that the photon is virtual and consequently has a (virtual) mass.


  • Although the masslessness is ultimately destroyed by the Majorana mass terms (or by ordinary

    The Reference Frame


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