• ziggurism@lemmy.world
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    1 year ago

    There is no tree level photon-photon interaction. Photons scatter off electrons (or any other charged particle), not off neutral photons.

      • ziggurism@lemmy.world
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        1 year ago

        The electromagnetic field does have a force carrier. It is the photon.

        The photon mediates the force between electrically charged particles. It cannot mediate any reaction between two neutral photons.