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The motion of photons.

  1. Sep 5, 2012 #1
    It is my understanding that a photon is essentially energy in motion. However, if by example, I were to shoot a photon in the form of light, at someones eye. Where does the photon go, once it reaches a rest position after colliding with the eye?

    1. Is the energy that makes this photon, simply destroyed once it reaches a rest position?
    2. Where does it go?
  2. jcsd
  3. Sep 5, 2012 #2


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    Gold Member

    Energy cannot be destroyed. The energy and momentum of the photon are passed on and may stimulate a chemical reaction ( for instance).
  4. Sep 6, 2012 #3


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    Science Advisor

    Also the photon does not "come to rest". Is simply no longer exists after the photon's energy has been absorbed into a body.
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