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Does a photon have a mass?

  1. May 19, 2015 #1
    Does a photon have a mass?
     
  2. jcsd
  3. May 19, 2015 #2

    ghwellsjr

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    Did you look on the Relativity FAQ list for the answer to this Frequently Asked Question?
     
  4. May 19, 2015 #3

    wabbit

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    Huh ?

    A photon has momentum, and energy as well, this doesn't mean it has mass.
     
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