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Thread: Mass of photon

  1. #1 Mass of photon 
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    what is the mass of photon when it is moving??


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    It's apparent mass, i.e. the mass a photon would appear to have from considering conservation of momentum in collisions, is given by .


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  4. #3  
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    Quote Originally Posted by ajmalazeez007 View Post
    what is the mass of photon when it is moving??
    Photons are always moving, and at the speed of light, if in a vacuum.
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