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Photons, mass, momentum

  1. Mar 26, 2008 #1
    Hi,
    Sorry but could someone help and direct me to a scientific article discussing why photons are considered massless yet they still have momentum. I'm new and I'm sure its on here. Thanks. Any explanations would be cool too.
     
  2. jcsd
  3. Mar 27, 2008 #2

    Hootenanny

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