Question: why/how Is there an upper limit to the energy of a single photon

  1. Hi leelee1997,

    The short answer is that there is NO upper limit to the energy of a single photon.

    A photon CAN have any energy at all, so the question is whether there are any physical processes (things going on) in the universe that can make a photon with some really large energy. The highest-energy photons are generated in (i) extreme astrophysical conditions (such as by matter spiralling around a black hole) and (ii) particle collider experiments (such as those at the world’s most powerful accelerator, the LHC at CERN:


  2. Hi leelee1997,

    what Edward says! He’s the physics expert!