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 - From Wikipedia:
  - > The name photon derives from the Greek word for light, [[φῶς]] (transliterated phôs).
  - > Although Wolfers's and Lewis's theories were contradicted by many experiments and never accepted, the new name was adopted by most physicists very soon after Compton used it.
+  - > In physics, a photon is usually denoted by the symbol [[γ]] (the Greek letter gamma). This symbol for the photon probably derives from gamma rays,