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Homework Help: Number of photons in light

  1. Sep 24, 2009 #1
    i want to know how to calculate the number of photons in light
  2. jcsd
  3. Sep 25, 2009 #2


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    Staff: Mentor

    Use the fact that the energy per photon is E = hf, and use the total energy in the light to calculate how many photons are making up that energy.
  4. Sep 25, 2009 #3
    Please can you tell me the formula for the total energy in light
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