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How many photons does it emit?

  1. Sep 11, 2007 #1
    a 1-kW raido transmitter operates at 880kHz. How many photons per second does it emit?

    Power=work/time
    Power=change in KE/time

    f=1/T
    T=1/880kHz

    so 1 kw=change in KE/1.136x10^-6

    change in KE=.00136 J

    i don't know if i am doing this right. please point me in the right direction.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 11, 2007 #2

    Kurdt

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    You know the frequency (880kHz) of the photons and thus you can work out their energy with an equation you haven't written down. Then you know how much energy it uses per second (1 kW) and you can find the amount of photons per second from that?
     
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